Initial commit: Modern Tetris implementation with official rules and scoring system

.gitignore

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+# Built application files
+*.apk
+*.aar
+*.ap_
+*.aab
+
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log Files
+*.log
+
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# IntelliJ
+*.iml
+.idea/
+
+# External native build folder
+.externalNativeBuild
+.cxx/
+
+# Mac OS
+.DS_Store
+
+# Signing files
+.signing/
+
+# Version control
+vcs.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof 

.vscode/settings.json

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+{
+    "java.configuration.updateBuildConfiguration": "automatic"
+}

README.md

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+# Mintris
+
+A modern Tetris implementation for Android, featuring official Tetris rules, smooth animations, and responsive controls.
+
+## Features
+
+### Core Gameplay
+- Official Tetris rules and mechanics
+- 7-bag randomizer for piece distribution
+- Hold piece functionality
+- Ghost piece preview
+- Hard drop and soft drop
+- Wall kick system for rotations
+- T-Spin detection and scoring
+
+### Modern Android Features
+- Optimized for Android 10+ (API 29+)
+- Hardware-accelerated rendering
+- High refresh rate support
+- Haptic feedback
+- Dark theme support
+- Responsive touch controls
+
+### Scoring System
+
+The game features a comprehensive scoring system based on official Tetris rules:
+
+#### Base Scores
+- Single line: 40 points
+- Double: 100 points
+- Triple: 300 points
+- Tetris (4 lines): 1200 points
+
+#### Multipliers
+
+1. **Level Multiplier**
+   - Score is multiplied by current level
+   - Level increases every 10 lines cleared
+
+2. **Combo System**
+   - Combo counter increases with each line clear
+   - Resets if no lines are cleared
+   - Multipliers:
+     - 1 combo: 1.0x
+     - 2 combos: 1.5x
+     - 3 combos: 2.0x
+     - 4 combos: 2.5x
+     - 5+ combos: 3.0x
+
+3. **Back-to-Back Tetris**
+   - 50% bonus (1.5x) for consecutive Tetris clears
+   - Resets if a non-Tetris clear is performed
+
+4. **Perfect Clear**
+   - 2x for single line
+   - 3x for double
+   - 4x for triple
+   - 5x for Tetris
+   - Awarded when clearing lines without leaving blocks
+
+5. **All Clear**
+   - 2x multiplier when clearing all blocks
+   - Requires no blocks in grid and no pieces in play
+
+6. **T-Spin Bonuses**
+   - Single: 2x
+   - Double: 4x
+   - Triple: 6x
+
+#### Example Score Calculation
+A back-to-back T-Spin Tetris with a 3x combo at level 2:
+```
+Base Score: 1200
+Level: 2
+Combo: 3x
+Back-to-Back: 1.5x
+T-Spin: 6x
+Final Score: 1200 * 2 * 3 * 1.5 * 6 = 64,800
+```
+
+### Controls
+- Tap left/right to move piece
+- Tap up to rotate
+- Double tap to hard drop
+- Long press to hold piece
+- Swipe down for soft drop
+
+## Technical Details
+
+### Requirements
+- Android 10 (API 29) or higher
+- OpenGL ES 2.0 or higher
+- 2GB RAM minimum
+
+### Performance Optimizations
+- Hardware-accelerated rendering
+- Efficient collision detection
+- Optimized grid operations
+- Smooth animations at 60fps
+
+### Architecture
+- Written in Kotlin
+- Uses Android Canvas for rendering
+- Implements MVVM architecture
+- Follows Material Design guidelines
+
+## Building from Source
+
+1. Clone the repository:
+```bash
+git clone https://github.com/yourusername/mintris.git
+```
+
+2. Open the project in Android Studio
+
+3. Build and run on your device or emulator
+
+## Contributing
+
+Contributions are welcome! Please feel free to submit a Pull Request.
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details. 

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    namespace 'com.mintris'
+    compileSdk 34
+
+    defaultConfig {
+        applicationId "com.mintris"
+        minSdk 30
+        targetSdk 34
+        versionCode 1
+        versionName "1.0"
+        
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    
+    buildFeatures {
+        viewBinding true
+    }
+    
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+    
+    kotlinOptions {
+        jvmTarget = '17'
+    }
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.12.0'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'com.google.android.material:material:1.11.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.7.0'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.7.0'
+    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.7.0'
+    implementation 'androidx.window:window:1.2.0'  // For better display support
+    implementation 'androidx.window:window-java:1.2.0'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+} 

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Keep models intact
+-keep class com.mintris.model.** { *; }
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile 

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Mintris">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:screenOrientation="portrait"
+            android:theme="@style/Theme.Mintris.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest> 

app/src/main/java/com/mintris/MainActivity.kt

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+package com.mintris
+
+import android.content.Context
+import android.os.Build
+import android.os.Bundle
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.os.VibratorManager
+import android.view.View
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import com.mintris.databinding.ActivityMainBinding
+import com.mintris.game.GameHaptics
+import com.mintris.game.GameView
+import com.mintris.game.NextPieceView
+import android.view.HapticFeedbackConstants
+
+class MainActivity : AppCompatActivity() {
+    
+    // UI components
+    private lateinit var binding: ActivityMainBinding
+    private lateinit var gameView: GameView
+    private lateinit var scoreText: TextView
+    private lateinit var levelText: TextView
+    private lateinit var linesText: TextView
+    private lateinit var gameOverContainer: LinearLayout
+    private lateinit var pauseContainer: LinearLayout
+    private lateinit var playAgainButton: Button
+    private lateinit var resumeButton: Button
+    private lateinit var settingsButton: Button
+    private lateinit var finalScoreText: TextView
+    private lateinit var nextPieceView: NextPieceView
+    private lateinit var levelDownButton: Button
+    private lateinit var levelUpButton: Button
+    private lateinit var selectedLevelText: TextView
+    private lateinit var gameHaptics: GameHaptics
+    
+    // Game state
+    private var isSoundEnabled = true
+    private var selectedLevel = 1
+    private val maxLevel = 10
+    
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        
+        // Initialize game haptics
+        gameHaptics = GameHaptics(this)
+        
+        // Set up game view
+        gameView = binding.gameView
+        scoreText = binding.scoreText
+        levelText = binding.levelText
+        linesText = binding.linesText
+        gameOverContainer = binding.gameOverContainer
+        pauseContainer = binding.pauseContainer
+        playAgainButton = binding.playAgainButton
+        resumeButton = binding.resumeButton
+        settingsButton = binding.settingsButton
+        finalScoreText = binding.finalScoreText
+        nextPieceView = binding.nextPieceView
+        levelDownButton = binding.levelDownButton
+        levelUpButton = binding.levelUpButton
+        selectedLevelText = binding.selectedLevelText
+        
+        // Connect the next piece view to the game view
+        nextPieceView.setGameView(gameView)
+        
+        // Set up callbacks
+        gameView.onGameStateChanged = { score, level, lines ->
+            updateUI(score, level, lines)
+        }
+        
+        gameView.onGameOver = { score ->
+            showGameOver(score)
+        }
+        
+        gameView.onLineClear = { lineCount ->
+            // Use enhanced haptic feedback for line clears
+            if (isSoundEnabled) {
+                gameHaptics.vibrateForLineClear(lineCount)
+            }
+        }
+        
+        // Add callbacks for piece movement and locking
+        gameView.onPieceMove = {
+            if (isSoundEnabled) {
+                gameHaptics.vibrateForPieceMove()
+            }
+        }
+        
+        gameView.onPieceLock = {
+            if (isSoundEnabled) {
+                gameHaptics.vibrateForPieceLock()
+            }
+        }
+        
+        // Set up button click listeners with haptic feedback
+        playAgainButton.setOnClickListener {
+            gameHaptics.performHapticFeedback(it, HapticFeedbackConstants.VIRTUAL_KEY)
+            hideGameOver()
+            gameView.reset()
+            setGameLevel(selectedLevel)
+            gameView.start()
+        }
+        
+        resumeButton.setOnClickListener {
+            gameHaptics.performHapticFeedback(it, HapticFeedbackConstants.VIRTUAL_KEY)
+            hidePauseMenu()
+            gameView.start()
+        }
+        
+        settingsButton.setOnClickListener {
+            gameHaptics.performHapticFeedback(it, HapticFeedbackConstants.VIRTUAL_KEY)
+            toggleSound()
+        }
+        
+        // Set up level selector with haptic feedback
+        levelDownButton.setOnClickListener {
+            if (selectedLevel > 1) {
+                gameHaptics.performHapticFeedback(it, HapticFeedbackConstants.VIRTUAL_KEY)
+                selectedLevel--
+                updateLevelSelector()
+            }
+        }
+        
+        levelUpButton.setOnClickListener {
+            if (selectedLevel < maxLevel) {
+                gameHaptics.performHapticFeedback(it, HapticFeedbackConstants.VIRTUAL_KEY)
+                selectedLevel++
+                updateLevelSelector()
+            }
+        }
+        
+        // Initialize level selector
+        updateLevelSelector()
+        
+        // Start game when clicking the screen initially
+        setupTouchToStart()
+        
+        // Start with the game paused
+        gameView.pause()
+        
+        // Enable edge-to-edge display
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            window.setDecorFitsSystemWindows(false)
+        }
+    }
+    
+    /**
+     * Set up touch-to-start behavior for initial screen
+     */
+    private fun setupTouchToStart() {
+        val touchToStart = View.OnClickListener {
+            if (gameView.isGameOver()) {
+                hideGameOver()
+                gameView.reset()
+                gameView.start()
+            } else if (pauseContainer.visibility == View.VISIBLE) {
+                hidePauseMenu()
+                gameView.start()
+            } else {
+                gameView.start()
+            }
+        }
+        
+        // Add the click listener to the game view
+        gameView.setOnClickListener(touchToStart)
+    }
+    
+    /**
+     * Update UI with current game state
+     */
+    private fun updateUI(score: Int, level: Int, lines: Int) {
+        scoreText.text = score.toString()
+        levelText.text = level.toString()
+        linesText.text = lines.toString()
+        
+        // Force redraw of next piece preview
+        nextPieceView.invalidate()
+    }
+    
+    /**
+     * Show game over screen
+     */
+    private fun showGameOver(score: Int) {
+        finalScoreText.text = getString(R.string.score) + ": " + score
+        gameOverContainer.visibility = View.VISIBLE
+        
+        // Vibrate to indicate game over
+        vibrate(VibrationEffect.EFFECT_DOUBLE_CLICK)
+    }
+    
+    /**
+     * Hide game over screen
+     */
+    private fun hideGameOver() {
+        gameOverContainer.visibility = View.GONE
+    }
+    
+    /**
+     * Show pause menu
+     */
+    private fun showPauseMenu() {
+        pauseContainer.visibility = View.VISIBLE
+    }
+    
+    /**
+     * Hide pause menu
+     */
+    private fun hidePauseMenu() {
+        pauseContainer.visibility = View.GONE
+    }
+    
+    /**
+     * Toggle sound on/off
+     */
+    private fun toggleSound() {
+        isSoundEnabled = !isSoundEnabled
+        settingsButton.text = getString(
+            if (isSoundEnabled) R.string.sound_on else R.string.sound_off
+        )
+        
+        // Vibrate to provide feedback
+        vibrate(VibrationEffect.EFFECT_CLICK)
+    }
+    
+    /**
+     * Trigger device vibration with predefined effect
+     */
+    private fun vibrate(effectId: Int) {
+        val vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+        vibrator.vibrate(VibrationEffect.createPredefined(effectId))
+    }
+    
+    /**
+     * Update the level selector display
+     */
+    private fun updateLevelSelector() {
+        selectedLevelText.text = selectedLevel.toString()
+    }
+    
+    /**
+     * Set the game level
+     */
+    private fun setGameLevel(level: Int) {
+        gameView.gameBoard.level = level
+        gameView.gameBoard.lines = (level - 1) * 10
+        gameView.gameBoard.dropInterval = (1000 * Math.pow(0.8, (level - 1).toDouble())).toLong()
+        
+        // Update UI
+        levelText.text = level.toString()
+        linesText.text = gameView.gameBoard.lines.toString()
+    }
+    
+    override fun onPause() {
+        super.onPause()
+        if (!gameView.isGameOver()) {
+            gameView.pause()
+            showPauseMenu()
+        }
+    }
+    
+    @Deprecated("Deprecated in Java")
+    override fun onBackPressed() {
+        if (gameOverContainer.visibility == View.VISIBLE) {
+            hideGameOver()
+            gameView.reset()
+            return
+        }
+        
+        if (pauseContainer.visibility == View.GONE) {
+            gameView.pause()
+            showPauseMenu()
+        } else {
+            hidePauseMenu()
+            gameView.start()
+        }
+    }
+} 

app/src/main/java/com/mintris/game/GameHaptics.kt

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+package com.mintris.game
+
+import android.content.Context
+import android.os.Build
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.os.VibratorManager
+import android.view.HapticFeedbackConstants
+import android.view.View
+
+class GameHaptics(private val context: Context) {
+    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
+        vibratorManager.defaultVibrator
+    } else {
+        @Suppress("DEPRECATION")
+        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+    }
+
+    fun performHapticFeedback(view: View, feedbackType: Int) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            view.performHapticFeedback(HapticFeedbackConstants.CONFIRM)
+        } else {
+            @Suppress("DEPRECATION")
+            view.performHapticFeedback(feedbackType)
+        }
+    }
+
+    fun vibrateForLineClear(lineCount: Int) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val duration = when (lineCount) {
+                4 -> 100L // Tetris
+                3 -> 80L
+                2 -> 60L
+                1 -> 40L
+                else -> 0L
+            }
+            
+            val amplitude = when (lineCount) {
+                4 -> VibrationEffect.DEFAULT_AMPLITUDE
+                3 -> (VibrationEffect.DEFAULT_AMPLITUDE * 0.8).toInt()
+                2 -> (VibrationEffect.DEFAULT_AMPLITUDE * 0.6).toInt()
+                1 -> (VibrationEffect.DEFAULT_AMPLITUDE * 0.4).toInt()
+                else -> 0
+            }
+
+            if (duration > 0 && amplitude > 0) {
+                val vibrationEffect = VibrationEffect.createOneShot(duration, amplitude)
+                vibrator.vibrate(vibrationEffect)
+            }
+        }
+    }
+
+    fun vibrateForPieceLock() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val vibrationEffect = VibrationEffect.createOneShot(50L, VibrationEffect.DEFAULT_AMPLITUDE)
+            vibrator.vibrate(vibrationEffect)
+        }
+    }
+
+    fun vibrateForPieceMove() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val amplitude = (VibrationEffect.DEFAULT_AMPLITUDE * 0.3).toInt().coerceAtLeast(1)
+            val vibrationEffect = VibrationEffect.createOneShot(20L, amplitude)
+            vibrator.vibrate(vibrationEffect)
+        }
+    }
+} 

app/src/main/java/com/mintris/game/GameView.kt

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+package com.mintris.game
+
+import android.animation.ValueAnimator
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.Rect
+import android.graphics.RectF
+import android.os.Build
+import android.os.Handler
+import android.os.Looper
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+import android.view.animation.LinearInterpolator
+import android.view.WindowManager
+import android.view.Display
+import android.hardware.display.DisplayManager
+import com.mintris.model.GameBoard
+import com.mintris.model.Tetromino
+import com.mintris.model.TetrominoType
+import kotlin.math.abs
+import kotlin.math.min
+
+/**
+ * GameView that renders the Tetris game and handles touch input
+ */
+class GameView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : View(context, attrs, defStyleAttr) {
+
+    // Game board model
+    val gameBoard = GameBoard()
+    
+    // Game state
+    private var isRunning = false
+    private var isPaused = false
+    
+    // Rendering
+    private val blockPaint = Paint().apply {
+        color = Color.WHITE
+        isAntiAlias = true
+    }
+    
+    private val ghostBlockPaint = Paint().apply {
+        color = Color.WHITE
+        alpha = 80  // 30% opacity
+        isAntiAlias = true
+    }
+    
+    private val gridPaint = Paint().apply {
+        color = Color.parseColor("#222222")  // Very dark gray
+        alpha = 40
+        isAntiAlias = true
+        strokeWidth = 1f
+        style = Paint.Style.STROKE
+    }
+    
+    private val glowPaint = Paint().apply {
+        color = Color.WHITE
+        alpha = 80
+        isAntiAlias = true
+        style = Paint.Style.STROKE
+        strokeWidth = 2f
+    }
+    
+    private val borderGlowPaint = Paint().apply {
+        color = Color.CYAN
+        alpha = 120
+        isAntiAlias = true
+        style = Paint.Style.STROKE
+        strokeWidth = 4f
+        setShadowLayer(10f, 0f, 0f, Color.CYAN)
+    }
+    
+    private val lineClearPaint = Paint().apply {
+        color = Color.WHITE
+        alpha = 255
+        isAntiAlias = true
+    }
+    
+    // Animation
+    private var lineClearAnimator: ValueAnimator? = null
+    private var lineClearProgress = 0f
+    private val lineClearDuration = 150L // milliseconds
+    
+    // Calculate block size based on view dimensions and board size
+    private var blockSize = 0f
+    private var boardLeft = 0f
+    private var boardTop = 0f
+    
+    // Game loop handler and runnable
+    private val handler = Handler(Looper.getMainLooper())
+    private val gameLoopRunnable = object : Runnable {
+        override fun run() {
+            if (isRunning && !isPaused) {
+                update()
+                invalidate()
+                handler.postDelayed(this, gameBoard.dropInterval)
+            }
+        }
+    }
+    
+    // Touch parameters
+    private var lastTouchX = 0f
+    private var lastTouchY = 0f
+    private var startX = 0f
+    private var startY = 0f
+    private var lastTapTime = 0L
+    private var lastRotationTime = 0L
+    private var minSwipeVelocity = 800  // Minimum velocity for swipe to be considered a hard drop
+    private val maxTapMovement = 20f    // Maximum movement allowed for a tap (in pixels)
+    private val minTapTime = 100L       // Minimum time for a tap (in milliseconds)
+    private val rotationCooldown = 150L // Minimum time between rotations (in milliseconds)
+    
+    // Callback for game events
+    var onGameStateChanged: ((score: Int, level: Int, lines: Int) -> Unit)? = null
+    var onGameOver: ((score: Int) -> Unit)? = null
+    var onLineClear: ((Int) -> Unit)? = null // New callback for line clear events
+    var onPieceMove: (() -> Unit)? = null // New callback for piece movement
+    var onPieceLock: (() -> Unit)? = null // New callback for piece locking
+    
+    init {
+        // Start with paused state
+        pause()
+        
+        // Connect our callbacks to the GameBoard
+        gameBoard.onPieceMove = { onPieceMove?.invoke() }
+        gameBoard.onPieceLock = { onPieceLock?.invoke() }
+        
+        // Enable hardware acceleration
+        setLayerType(LAYER_TYPE_HARDWARE, null)
+        
+        // Set better frame rate using modern APIs
+        val displayManager = context.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager
+        val display = displayManager.getDisplay(Display.DEFAULT_DISPLAY)
+        display?.let { disp ->
+            val refreshRate = disp.refreshRate
+            // Set game loop interval based on refresh rate, but don't go faster than the base interval
+            val targetFps = refreshRate.toInt()
+            if (targetFps > 0) {
+                gameBoard.dropInterval = gameBoard.dropInterval.coerceAtMost(1000L / targetFps)
+            }
+        }
+        
+        // Enable edge-to-edge rendering
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            setSystemGestureExclusionRects(listOf(Rect(0, 0, width, height)))
+        }
+    }
+    
+    /**
+     * Start the game
+     */
+    fun start() {
+        if (isPaused || !isRunning) {
+            isPaused = false
+            if (!isRunning) {
+                isRunning = true
+                gameBoard.reset()
+            }
+            handler.post(gameLoopRunnable)
+            invalidate()
+        }
+    }
+    
+    /**
+     * Pause the game
+     */
+    fun pause() {
+        isPaused = true
+        handler.removeCallbacks(gameLoopRunnable)
+        lineClearAnimator?.cancel()
+        invalidate()
+    }
+    
+    /**
+     * Reset the game
+     */
+    fun reset() {
+        isRunning = false
+        isPaused = true
+        gameBoard.reset()
+        handler.removeCallbacks(gameLoopRunnable)
+        lineClearAnimator?.cancel()
+        invalidate()
+    }
+    
+    /**
+     * Update game state (called on game loop)
+     */
+    private fun update() {
+        if (gameBoard.isGameOver) {
+            isRunning = false
+            isPaused = true
+            onGameOver?.invoke(gameBoard.score)
+            return
+        }
+        
+        // Move the current tetromino down automatically
+        gameBoard.moveDown()
+        
+        // Check if lines need to be cleared and start animation if needed
+        if (gameBoard.linesToClear.isNotEmpty() && gameBoard.isLineClearAnimationInProgress) {
+            // Trigger line clear callback for vibration
+            onLineClear?.invoke(gameBoard.linesToClear.size)
+            
+            // Start line clearing animation if not already running
+            if (lineClearAnimator == null || !lineClearAnimator!!.isRunning) {
+                startLineClearAnimation()
+            }
+        }
+        
+        // Update UI with current game state
+        onGameStateChanged?.invoke(gameBoard.score, gameBoard.level, gameBoard.lines)
+    }
+    
+    /**
+     * Start the line clearing animation
+     */
+    private fun startLineClearAnimation() {
+        lineClearAnimator?.cancel()
+        
+        lineClearAnimator = ValueAnimator.ofFloat(0f, 1f).apply {
+            duration = lineClearDuration
+            interpolator = LinearInterpolator()
+            
+            addUpdateListener { animator ->
+                lineClearProgress = animator.animatedValue as Float
+                invalidate()
+            }
+            
+            addListener(object : android.animation.AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: android.animation.Animator) {
+                    // When animation completes, actually clear the lines
+                    gameBoard.clearLinesFromGrid()
+                    invalidate()
+                }
+            })
+            
+            start()
+        }
+    }
+    
+    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
+        super.onSizeChanged(w, h, oldw, oldh)
+        
+        // Enable hardware acceleration
+        setLayerType(LAYER_TYPE_HARDWARE, null)
+        
+        // Update gesture exclusion rect for edge-to-edge rendering
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            setSystemGestureExclusionRects(listOf(Rect(0, 0, w, h)))
+        }
+        
+        calculateDimensions(w, h)
+    }
+    
+    /**
+     * Calculate dimensions for the board and blocks based on view size
+     */
+    private fun calculateDimensions(width: Int, height: Int) {
+        // Calculate block size based on available space
+        val horizontalBlocks = gameBoard.width
+        val verticalBlocks = gameBoard.height
+        
+        // Calculate block size to fit within the view
+        blockSize = min(
+            width.toFloat() / horizontalBlocks,
+            height.toFloat() / verticalBlocks
+        )
+        
+        // Center the board within the view
+        boardLeft = (width - (blockSize * horizontalBlocks)) / 2
+        boardTop = (height - (blockSize * verticalBlocks)) / 2
+    }
+    
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
+        
+        // Draw background (already black from theme)
+        
+        // Draw board border glow
+        drawBoardBorder(canvas)
+        
+        // Draw grid (very subtle)
+        drawGrid(canvas)
+        
+        // Check if line clear animation is in progress
+        if (gameBoard.isLineClearAnimationInProgress) {
+            // Draw the line clearing animation
+            drawLineClearAnimation(canvas)
+        } else {
+            // Draw locked pieces
+            drawLockedBlocks(canvas)
+        }
+        
+        if (!gameBoard.isGameOver && isRunning) {
+            // Draw ghost piece (landing preview)
+            drawGhostPiece(canvas)
+            
+            // Draw active piece
+            drawActivePiece(canvas)
+        }
+    }
+    
+    /**
+     * Draw the line clearing animation
+     */
+    private fun drawLineClearAnimation(canvas: Canvas) {
+        // Draw non-clearing blocks
+        for (y in 0 until gameBoard.height) {
+            // Skip lines that are being cleared
+            if (gameBoard.linesToClear.contains(y)) continue
+            
+            for (x in 0 until gameBoard.width) {
+                if (gameBoard.isOccupied(x, y)) {
+                    drawBlock(canvas, x, y, blockPaint)
+                }
+            }
+        }
+        
+        // Draw all clearing lines with a single animation effect
+        for (lineY in gameBoard.linesToClear) {
+            for (x in 0 until gameBoard.width) {
+                // Animation effects for all lines simultaneously
+                val brightness = 255 - (lineClearProgress * 200).toInt()
+                val scale = 1.0f - lineClearProgress * 0.5f
+                
+                // Set the paint for the clear animation
+                lineClearPaint.color = Color.WHITE
+                lineClearPaint.alpha = brightness.coerceIn(0, 255)
+                
+                // Calculate block position with scaling
+                val left = boardLeft + x * blockSize + (blockSize * (1 - scale) / 2)
+                val top = boardTop + lineY * blockSize + (blockSize * (1 - scale) / 2)
+                val right = left + blockSize * scale
+                val bottom = top + blockSize * scale
+                
+                // Draw the shrinking, fading block
+                val rect = RectF(left, top, right, bottom)
+                canvas.drawRect(rect, lineClearPaint)
+                
+                // Add a glow effect
+                lineClearPaint.setShadowLayer(10f * (1f - lineClearProgress), 0f, 0f, Color.WHITE)
+                canvas.drawRect(rect, lineClearPaint)
+            }
+        }
+    }
+    
+    /**
+     * Draw glowing border around the playable area
+     */
+    private fun drawBoardBorder(canvas: Canvas) {
+        val left = boardLeft
+        val top = boardTop
+        val right = boardLeft + gameBoard.width * blockSize
+        val bottom = boardTop + gameBoard.height * blockSize
+        
+        val rect = RectF(left, top, right, bottom)
+        canvas.drawRect(rect, borderGlowPaint)
+    }
+    
+    /**
+     * Draw the grid lines (very subtle)
+     */
+    private fun drawGrid(canvas: Canvas) {
+        // Draw vertical grid lines
+        for (x in 0..gameBoard.width) {
+            val xPos = boardLeft + x * blockSize
+            canvas.drawLine(
+                xPos, boardTop,
+                xPos, boardTop + gameBoard.height * blockSize,
+                gridPaint
+            )
+        }
+        
+        // Draw horizontal grid lines
+        for (y in 0..gameBoard.height) {
+            val yPos = boardTop + y * blockSize
+            canvas.drawLine(
+                boardLeft, yPos,
+                boardLeft + gameBoard.width * blockSize, yPos,
+                gridPaint
+            )
+        }
+    }
+    
+    /**
+     * Draw the locked blocks on the board
+     */
+    private fun drawLockedBlocks(canvas: Canvas) {
+        for (y in 0 until gameBoard.height) {
+            for (x in 0 until gameBoard.width) {
+                if (gameBoard.isOccupied(x, y)) {
+                    drawBlock(canvas, x, y, blockPaint)
+                }
+            }
+        }
+    }
+    
+    /**
+     * Draw the currently active tetromino
+     */
+    private fun drawActivePiece(canvas: Canvas) {
+        val piece = gameBoard.getCurrentPiece() ?: return
+        
+        for (y in 0 until piece.getHeight()) {
+            for (x in 0 until piece.getWidth()) {
+                if (piece.isBlockAt(x, y)) {
+                    val boardX = piece.x + x
+                    val boardY = piece.y + y
+                    
+                    // Only draw if within bounds and visible on screen
+                    if (boardY >= 0 && boardY < gameBoard.height && 
+                        boardX >= 0 && boardX < gameBoard.width) {
+                        drawBlock(canvas, boardX, boardY, blockPaint)
+                    }
+                }
+            }
+        }
+    }
+    
+    /**
+     * Draw the ghost piece (landing preview)
+     */
+    private fun drawGhostPiece(canvas: Canvas) {
+        val piece = gameBoard.getCurrentPiece() ?: return
+        val ghostY = gameBoard.getGhostY()
+        
+        for (y in 0 until piece.getHeight()) {
+            for (x in 0 until piece.getWidth()) {
+                if (piece.isBlockAt(x, y)) {
+                    val boardX = piece.x + x
+                    val boardY = ghostY + y
+                    
+                    // Only draw if within bounds and visible on screen
+                    if (boardY >= 0 && boardY < gameBoard.height && 
+                        boardX >= 0 && boardX < gameBoard.width) {
+                        drawBlock(canvas, boardX, boardY, ghostBlockPaint)
+                    }
+                }
+            }
+        }
+    }
+    
+    /**
+     * Draw a single tetris block at the given grid position
+     */
+    private fun drawBlock(canvas: Canvas, x: Int, y: Int, paint: Paint) {
+        val left = boardLeft + x * blockSize
+        val top = boardTop + y * blockSize
+        val right = left + blockSize
+        val bottom = top + blockSize
+        
+        // Draw block with a slight inset to create separation
+        val rect = RectF(left + 1, top + 1, right - 1, bottom - 1)
+        canvas.drawRect(rect, paint)
+        
+        // Draw enhanced glow effect
+        val glowRect = RectF(left, top, right, bottom)
+        val blockGlowPaint = Paint(glowPaint)
+        if (paint == blockPaint) {
+            val piece = gameBoard.getCurrentPiece()
+            if (piece != null && isPositionInPiece(x, y, piece)) {
+                // Set glow color based on piece type
+                blockGlowPaint.color = getTetrominoColor(piece.type)
+                blockGlowPaint.alpha = 150
+                blockGlowPaint.setShadowLayer(3f, 0f, 0f, blockGlowPaint.color)
+            }
+        }
+        canvas.drawRect(glowRect, blockGlowPaint)
+    }
+    
+    /**
+     * Check if the given board position is part of the current piece
+     */
+    private fun isPositionInPiece(boardX: Int, boardY: Int, piece: Tetromino): Boolean {
+        for (y in 0 until piece.getHeight()) {
+            for (x in 0 until piece.getWidth()) {
+                if (piece.isBlockAt(x, y)) {
+                    val pieceX = piece.x + x
+                    val pieceY = piece.y + y
+                    if (pieceX == boardX && pieceY == boardY) {
+                        return true
+                    }
+                }
+            }
+        }
+        return false
+    }
+    
+    /**
+     * Get color for tetromino type
+     */
+    private fun getTetrominoColor(type: TetrominoType): Int {
+        return when (type) {
+            TetrominoType.I -> Color.CYAN
+            TetrominoType.J -> Color.BLUE
+            TetrominoType.L -> Color.rgb(255, 165, 0) // Orange
+            TetrominoType.O -> Color.YELLOW
+            TetrominoType.S -> Color.GREEN
+            TetrominoType.T -> Color.MAGENTA
+            TetrominoType.Z -> Color.RED
+        }
+    }
+    
+    // Custom touch event handling
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        if (!isRunning || isPaused || gameBoard.isGameOver) {
+            return true
+        }
+        
+        when (event.action) {
+            MotionEvent.ACTION_DOWN -> {
+                // Record start of touch
+                startX = event.x
+                startY = event.y
+                lastTouchX = event.x
+                lastTouchY = event.y
+                
+                // Check for double tap (rotate)
+                val currentTime = System.currentTimeMillis()
+                if (currentTime - lastTapTime < 250) {
+                    // Double tap detected, rotate the piece
+                    if (currentTime - lastRotationTime >= rotationCooldown) {
+                        gameBoard.rotate()
+                        lastRotationTime = currentTime
+                        invalidate()
+                    }
+                }
+                lastTapTime = currentTime
+            }
+            
+            MotionEvent.ACTION_MOVE -> {
+                val deltaX = event.x - lastTouchX
+                val deltaY = event.y - lastTouchY
+                
+                // Horizontal movement (left/right)
+                if (abs(deltaX) > blockSize) {
+                    if (deltaX > 0) {
+                        gameBoard.moveRight()
+                    } else {
+                        gameBoard.moveLeft()
+                    }
+                    lastTouchX = event.x
+                    invalidate()
+                }
+                
+                // Vertical movement (soft drop)
+                if (deltaY > blockSize / 2) {
+                    gameBoard.moveDown()
+                    lastTouchY = event.y
+                    invalidate()
+                }
+            }
+            
+            MotionEvent.ACTION_UP -> {
+                // Calculate movement speed for potential fling detection
+                val moveTime = System.currentTimeMillis() - lastTapTime
+                val deltaY = event.y - startY
+                val deltaX = event.x - startX
+                
+                // If the movement was fast and downward, treat as hard drop
+                if (moveTime > 0 && deltaY > blockSize && (deltaY / moveTime) * 1000 > minSwipeVelocity) {
+                    gameBoard.hardDrop()
+                    invalidate()
+                } else if (moveTime < minTapTime && 
+                         abs(deltaY) < maxTapMovement && 
+                         abs(deltaX) < maxTapMovement) {
+                    // Quick tap with minimal movement (rotation)
+                    val currentTime = System.currentTimeMillis()
+                    if (currentTime - lastRotationTime >= rotationCooldown) {
+                        gameBoard.rotate()
+                        lastRotationTime = currentTime
+                        invalidate()
+                    }
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    /**
+     * Get the current score
+     */
+    fun getScore(): Int = gameBoard.score
+    
+    /**
+     * Get the current level
+     */
+    fun getLevel(): Int = gameBoard.level
+    
+    /**
+     * Get the number of lines cleared
+     */
+    fun getLines(): Int = gameBoard.lines
+    
+    /**
+     * Check if the game is over
+     */
+    fun isGameOver(): Boolean = gameBoard.isGameOver
+    
+    /**
+     * Get the next tetromino
+     */
+    fun getNextPiece() = gameBoard.getNextPiece()
+    
+    /**
+     * Clean up resources when view is detached
+     */
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        handler.removeCallbacks(gameLoopRunnable)
+    }
+} 

app/src/main/java/com/mintris/game/NextPieceView.kt

@@ -0,0 +1,82 @@
+package com.mintris.game
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.RectF
+import android.util.AttributeSet
+import android.view.View
+import kotlin.math.min
+
+/**
+ * Custom view to display the next Tetromino piece
+ */
+class NextPieceView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : View(context, attrs, defStyleAttr) {
+
+    private var gameView: GameView? = null
+    
+    // Rendering
+    private val blockPaint = Paint().apply {
+        color = Color.WHITE
+        isAntiAlias = true
+    }
+    
+    private val glowPaint = Paint().apply {
+        color = Color.WHITE
+        alpha = 80
+        isAntiAlias = true
+        style = Paint.Style.STROKE
+        strokeWidth = 2f
+    }
+    
+    /**
+     * Set the game view to get the next piece from
+     */
+    fun setGameView(gameView: GameView) {
+        this.gameView = gameView
+    }
+    
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
+        
+        // Get the next piece from game view
+        gameView?.let {
+            it.getNextPiece()?.let { piece ->
+                val width = piece.getWidth()
+                val height = piece.getHeight()
+                
+                // Calculate block size for the preview (smaller than main board)
+                val previewBlockSize = min(
+                    canvas.width.toFloat() / (width + 2),
+                    canvas.height.toFloat() / (height + 2)
+                )
+                
+                // Center the piece in the preview area
+                val previewLeft = (canvas.width - width * previewBlockSize) / 2
+                val previewTop = (canvas.height - height * previewBlockSize) / 2
+                
+                for (y in 0 until height) {
+                    for (x in 0 until width) {
+                        if (piece.isBlockAt(x, y)) {
+                            val left = previewLeft + x * previewBlockSize
+                            val top = previewTop + y * previewBlockSize
+                            val right = left + previewBlockSize
+                            val bottom = top + previewBlockSize
+                            
+                            val rect = RectF(left + 1, top + 1, right - 1, bottom - 1)
+                            canvas.drawRect(rect, blockPaint)
+                            
+                            val glowRect = RectF(left, top, right, bottom)
+                            canvas.drawRect(glowRect, glowPaint)
+                        }
+                    }
+                }
+            }
+        }
+    }
+} 

app/src/main/java/com/mintris/model/GameBoard.kt

@@ -0,0 +1,534 @@
+package com.mintris.model
+
+import kotlin.random.Random
+
+/**
+ * Represents the game board (grid) and manages game state
+ */
+class GameBoard(
+    val width: Int = 10,
+    val height: Int = 20
+) {
+    // Board grid to track locked pieces
+    // True = occupied, False = empty
+    private val grid = Array(height) { BooleanArray(width) { false } }
+    
+    // Current active tetromino
+    private var currentPiece: Tetromino? = null
+    
+    // Next tetromino to be played
+    private var nextPiece: Tetromino? = null
+    
+    // Hold piece
+    private var holdPiece: Tetromino? = null
+    private var canHold = true
+    
+    // 7-bag randomizer
+    private val bag = mutableListOf<TetrominoType>()
+    
+    // Game state
+    var score = 0
+    var level = 1
+    var lines = 0
+    var isGameOver = false
+    
+    // Scoring state
+    private var combo = 0
+    private var lastClearWasTetris = false
+    private var lastClearWasPerfect = false
+    private var lastClearWasAllClear = false
+    
+    // Animation state
+    var linesToClear = mutableListOf<Int>()
+    var isLineClearAnimationInProgress = false
+    
+    // Initial game speed (milliseconds per drop)
+    var dropInterval = 1000L
+    
+    // Callbacks for game events
+    var onPieceMove: (() -> Unit)? = null
+    var onPieceLock: (() -> Unit)? = null
+    
+    init {
+        spawnNextPiece()
+        spawnPiece()
+    }
+    
+    /**
+     * Generates the next tetromino piece using 7-bag randomizer
+     */
+    private fun spawnNextPiece() {
+        // If bag is empty, refill it with all piece types
+        if (bag.isEmpty()) {
+            bag.addAll(TetrominoType.values())
+            bag.shuffle()
+        }
+        
+        // Take the next piece from the bag
+        nextPiece = Tetromino(bag.removeFirst())
+    }
+    
+    /**
+     * Hold the current piece
+     */
+    fun holdPiece() {
+        if (!canHold) return
+        
+        val current = currentPiece
+        if (holdPiece == null) {
+            // If no piece is held, hold current piece and spawn new one
+            holdPiece = current
+            spawnNextPiece()
+            spawnPiece()
+        } else {
+            // Swap current piece with held piece
+            currentPiece = holdPiece
+            holdPiece = current
+            // Reset position of swapped piece
+            currentPiece?.apply {
+                x = (width - getWidth()) / 2
+                y = 0
+            }
+        }
+        canHold = false
+    }
+    
+    /**
+     * Get the currently held piece
+     */
+    fun getHoldPiece(): Tetromino? = holdPiece
+    
+    /**
+     * Spawns the current tetromino at the top of the board
+     */
+    fun spawnPiece() {
+        currentPiece = nextPiece
+        spawnNextPiece()
+        
+        // Center the piece horizontally
+        currentPiece?.apply {
+            x = (width - getWidth()) / 2
+            y = 0
+            
+            // Check if the piece can be placed (Game Over condition)
+            if (!canMove(0, 0)) {
+                isGameOver = true
+            }
+        }
+    }
+    
+    /**
+     * Move the current piece left
+     */
+    fun moveLeft() {
+        if (canMove(-1, 0)) {
+            currentPiece?.x = currentPiece?.x?.minus(1) ?: 0
+            onPieceMove?.invoke()
+        }
+    }
+    
+    /**
+     * Move the current piece right
+     */
+    fun moveRight() {
+        if (canMove(1, 0)) {
+            currentPiece?.x = currentPiece?.x?.plus(1) ?: 0
+            onPieceMove?.invoke()
+        }
+    }
+    
+    /**
+     * Move the current piece down (soft drop)
+     */
+    fun moveDown(): Boolean {
+        return if (canMove(0, 1)) {
+            currentPiece?.y = currentPiece?.y?.plus(1) ?: 0
+            onPieceMove?.invoke()
+            true
+        } else {
+            lockPiece()
+            false
+        }
+    }
+    
+    /**
+     * Hard drop the current piece
+     */
+    fun hardDrop() {
+        while (moveDown()) {
+            // Keep moving down until blocked
+        }
+    }
+    
+    /**
+     * Rotate the current piece clockwise
+     */
+    fun rotate() {
+        currentPiece?.let {
+            // Save current rotation
+            val originalX = it.x
+            val originalY = it.y
+            
+            // Try to rotate
+            it.rotateClockwise()
+            
+            // Wall kick logic - try to move the piece if rotation causes collision
+            if (!canMove(0, 0)) {
+                // Try to move left
+                if (canMove(-1, 0)) {
+                    it.x--
+                }
+                // Try to move right
+                else if (canMove(1, 0)) {
+                    it.x++
+                }
+                // Try to move 2 spaces (for I piece)
+                else if (canMove(-2, 0)) {
+                    it.x -= 2
+                }
+                else if (canMove(2, 0)) {
+                    it.x += 2
+                }
+                // Try to move up for floor kicks
+                else if (canMove(0, -1)) {
+                    it.y--
+                }
+                // Revert if can't find a valid position
+                else {
+                    it.rotateCounterClockwise()
+                    it.x = originalX
+                    it.y = originalY
+                }
+            }
+        }
+    }
+    
+    /**
+     * Check if the current piece can move to the given position
+     */
+    fun canMove(deltaX: Int, deltaY: Int): Boolean {
+        val piece = currentPiece ?: return false
+        
+        val newX = piece.x + deltaX
+        val newY = piece.y + deltaY
+        
+        for (y in 0 until piece.getHeight()) {
+            for (x in 0 until piece.getWidth()) {
+                if (piece.isBlockAt(x, y)) {
+                    val boardX = newX + x
+                    val boardY = newY + y
+                    
+                    // Check if the position is outside the board
+                    if (boardX < 0 || boardX >= width || boardY >= height) {
+                        return false
+                    }
+                    
+                    // Check if the position is already occupied (but not if it's above the board)
+                    if (boardY >= 0 && grid[boardY][boardX]) {
+                        return false
+                    }
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    /**
+     * Lock the current piece in place and check for completed lines
+     */
+    fun lockPiece() {
+        val piece = currentPiece ?: return
+        
+        // Add the piece to the grid
+        for (y in 0 until piece.getHeight()) {
+            for (x in 0 until piece.getWidth()) {
+                if (piece.isBlockAt(x, y)) {
+                    val boardX = piece.x + x
+                    val boardY = piece.y + y
+                    
+                    // Only add to grid if within bounds
+                    if (boardY >= 0 && boardY < height && boardX >= 0 && boardX < width) {
+                        grid[boardY][boardX] = true
+                    }
+                }
+            }
+        }
+        
+        // Trigger the piece lock vibration
+        onPieceLock?.invoke()
+        
+        // Find lines to clear
+        findLinesToClear()
+        
+        // Only spawn a new piece if we're not in the middle of clearing lines
+        if (!isLineClearAnimationInProgress) {
+            spawnPiece()
+        }
+        
+        // Allow holding piece again after locking
+        canHold = true
+    }
+    
+    /**
+     * Find lines that should be cleared and store them
+     */
+    private fun findLinesToClear() {
+        // Clear existing lines before finding new ones
+        linesToClear.clear()
+        
+        for (y in 0 until height) {
+            // Check if line is full
+            var lineFull = true
+            for (x in 0 until width) {
+                if (!grid[y][x]) {
+                    lineFull = false
+                    break
+                }
+            }
+            
+            if (lineFull) {
+                linesToClear.add(y)
+            }
+        }
+        
+        // Sort lines from bottom to top for proper clearing
+        if (linesToClear.isNotEmpty()) {
+            linesToClear.sortDescending()
+            isLineClearAnimationInProgress = true
+        }
+    }
+    
+    /**
+     * Prepare for line clearing animation
+     */
+    fun finishLineClearingEffect() {
+        if (linesToClear.isNotEmpty() && !isLineClearAnimationInProgress) {
+            clearLinesFromGrid()
+        }
+    }
+    
+    /**
+     * Actually clear the lines from the grid after animation
+     */
+    fun clearLinesFromGrid() {
+        if (linesToClear.isNotEmpty()) {
+            val clearedLines = linesToClear.size
+            
+            // Get the highest line that needs to be cleared
+            val highestLine = linesToClear.minOrNull() ?: return
+            
+            // Create a temporary grid to store the new state
+            val newGrid = Array(height) { BooleanArray(width) { false } }
+            
+            // Copy non-cleared lines to their new positions
+            var newY = height - 1
+            for (y in height - 1 downTo 0) {
+                if (y !in linesToClear) {
+                    for (x in 0 until width) {
+                        newGrid[newY][x] = grid[y][x]
+                    }
+                    newY--
+                }
+            }
+            
+            // Update the grid with the new state
+            for (y in 0 until height) {
+                for (x in 0 until width) {
+                    grid[y][x] = newGrid[y][x]
+                }
+            }
+            
+            // Calculate base score (NES scoring system)
+            val baseScore = when (clearedLines) {
+                1 -> 40
+                2 -> 100
+                3 -> 300
+                4 -> 1200 // Tetris
+                else -> 0
+            }
+            
+            // Check for perfect clear (no blocks left)
+            val isPerfectClear = !grid.any { row -> row.any { it } }
+            
+            // Check for all clear (no blocks in playfield)
+            val isAllClear = !grid.any { row -> row.any { it } } && 
+                           currentPiece == null && 
+                           nextPiece == null
+            
+            // Calculate combo multiplier
+            val comboMultiplier = if (combo > 0) {
+                when (combo) {
+                    1 -> 1.0
+                    2 -> 1.5
+                    3 -> 2.0
+                    4 -> 2.5
+                    else -> 3.0
+                }
+            } else 1.0
+            
+            // Calculate back-to-back Tetris bonus
+            val backToBackMultiplier = if (clearedLines == 4 && lastClearWasTetris) 1.5 else 1.0
+            
+            // Calculate perfect clear bonus
+            val perfectClearMultiplier = if (isPerfectClear) {
+                when (clearedLines) {
+                    1 -> 2.0
+                    2 -> 3.0
+                    3 -> 4.0
+                    4 -> 5.0
+                    else -> 1.0
+                }
+            } else 1.0
+            
+            // Calculate all clear bonus
+            val allClearMultiplier = if (isAllClear) 2.0 else 1.0
+            
+            // Calculate T-Spin bonus
+            val tSpinMultiplier = if (isTSpin()) {
+                when (clearedLines) {
+                    1 -> 2.0
+                    2 -> 4.0
+                    3 -> 6.0
+                    else -> 1.0
+                }
+            } else 1.0
+            
+            // Calculate final score with all multipliers
+            val finalScore = (baseScore * level * comboMultiplier * 
+                            backToBackMultiplier * perfectClearMultiplier * 
+                            allClearMultiplier * tSpinMultiplier).toInt()
+            
+            score += finalScore
+            
+            // Update combo counter
+            if (clearedLines > 0) {
+                combo++
+            } else {
+                combo = 0
+            }
+            
+            // Update line clear state
+            lastClearWasTetris = clearedLines == 4
+            lastClearWasPerfect = isPerfectClear
+            lastClearWasAllClear = isAllClear
+            
+            // Update lines cleared and level
+            lines += clearedLines
+            level = (lines / 10) + 1
+            
+            // Update game speed based on level (NES formula)
+            dropInterval = (1000 * Math.pow(0.8, (level - 1).toDouble())).toLong()
+            
+            // Reset animation state and clear lines
+            isLineClearAnimationInProgress = false
+            linesToClear.clear()
+            
+            // Now spawn the next piece after all lines are cleared
+            spawnPiece()
+        }
+    }
+    
+    /**
+     * Check if the last move was a T-Spin
+     */
+    private fun isTSpin(): Boolean {
+        val piece = currentPiece ?: return false
+        if (piece.type != TetrominoType.T) return false
+        
+        // Count occupied corners around the T piece
+        var occupiedCorners = 0
+        val centerX = piece.x + 1
+        val centerY = piece.y + 1
+        
+        // Check all four corners
+        if (isOccupied(centerX - 1, centerY - 1)) occupiedCorners++
+        if (isOccupied(centerX + 1, centerY - 1)) occupiedCorners++
+        if (isOccupied(centerX - 1, centerY + 1)) occupiedCorners++
+        if (isOccupied(centerX + 1, centerY + 1)) occupiedCorners++
+        
+        // T-Spin requires at least 3 occupied corners
+        return occupiedCorners >= 3
+    }
+    
+    /**
+     * Get the ghost piece position (preview of where piece will land)
+     */
+    fun getGhostY(): Int {
+        val piece = currentPiece ?: return 0
+        var ghostY = piece.y
+        
+        // Find how far the piece can move down
+        while (true) {
+            if (canMove(0, ghostY - piece.y + 1)) {
+                ghostY++
+            } else {
+                break
+            }
+        }
+        
+        return ghostY
+    }
+    
+    /**
+     * Get the current tetromino
+     */
+    fun getCurrentPiece(): Tetromino? = currentPiece
+    
+    /**
+     * Get the next tetromino
+     */
+    fun getNextPiece(): Tetromino? = nextPiece
+    
+    /**
+     * Check if a cell in the grid is occupied
+     */
+    fun isOccupied(x: Int, y: Int): Boolean {
+        return if (x in 0 until width && y in 0 until height) {
+            grid[y][x]
+        } else {
+            false
+        }
+    }
+    
+    /**
+     * Reset the game board
+     */
+    fun reset() {
+        // Clear the grid
+        for (y in 0 until height) {
+            for (x in 0 until width) {
+                grid[y][x] = false
+            }
+        }
+        
+        // Reset game state
+        score = 0
+        level = 1
+        lines = 0
+        isGameOver = false
+        dropInterval = 1000L
+        
+        // Reset scoring state
+        combo = 0
+        lastClearWasTetris = false
+        lastClearWasPerfect = false
+        lastClearWasAllClear = false
+        
+        // Reset piece state
+        holdPiece = null
+        canHold = true
+        bag.clear()
+        
+        // Initialize pieces
+        spawnNextPiece()
+        spawnPiece()
+    }
+    
+    /**
+     * Clear completed lines and move blocks down (legacy method, kept for reference)
+     */
+    private fun clearLines(): Int {
+        return linesToClear.size // Return the number of lines that will be cleared
+    }
+} 

app/src/main/java/com/mintris/model/Tetromino.kt

@@ -0,0 +1,260 @@
+package com.mintris.model
+
+/**
+ * Represents a Tetris piece (Tetromino)
+ */
+enum class TetrominoType {
+    I, J, L, O, S, T, Z
+}
+
+class Tetromino(val type: TetrominoType) {
+    
+    // Each tetromino has 4 rotations (0, 90, 180, 270 degrees)
+    private val blocks: Array<Array<BooleanArray>> = getBlocks(type)
+    private var currentRotation = 0
+    
+    // Current position in the game grid
+    var x = 0
+    var y = 0
+    
+    /**
+     * Get the current shape of the tetromino based on rotation
+     */
+    fun getCurrentShape(): Array<BooleanArray> {
+        return blocks[currentRotation]
+    }
+    
+    /**
+     * Get the width of the current tetromino shape
+     */
+    fun getWidth(): Int {
+        return blocks[currentRotation][0].size
+    }
+    
+    /**
+     * Get the height of the current tetromino shape
+     */
+    fun getHeight(): Int {
+        return blocks[currentRotation].size
+    }
+    
+    /**
+     * Rotate the tetromino clockwise
+     */
+    fun rotateClockwise() {
+        currentRotation = (currentRotation + 1) % 4
+    }
+    
+    /**
+     * Rotate the tetromino counter-clockwise
+     */
+    fun rotateCounterClockwise() {
+        currentRotation = (currentRotation + 3) % 4
+    }
+    
+    /**
+     * Check if the tetromino's block exists at the given coordinates
+     */
+    fun isBlockAt(blockX: Int, blockY: Int): Boolean {
+        val shape = blocks[currentRotation]
+        return if (blockY >= 0 && blockY < shape.size && 
+                  blockX >= 0 && blockX < shape[blockY].size) {
+            shape[blockY][blockX]
+        } else {
+            false
+        }
+    }
+    
+    companion object {
+        /**
+         * Get the block patterns for each tetromino type and all its rotations
+         */
+        private fun getBlocks(type: TetrominoType): Array<Array<BooleanArray>> {
+            return when (type) {
+                TetrominoType.I -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(false, false, false, false),
+                        booleanArrayOf(true, true, true, true),
+                        booleanArrayOf(false, false, false, false),
+                        booleanArrayOf(false, false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, false, true, false),
+                        booleanArrayOf(false, false, true, false),
+                        booleanArrayOf(false, false, true, false),
+                        booleanArrayOf(false, false, true, false)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false, false),
+                        booleanArrayOf(false, false, false, false),
+                        booleanArrayOf(true, true, true, true),
+                        booleanArrayOf(false, false, false, false)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(false, true, false, false),
+                        booleanArrayOf(false, true, false, false),
+                        booleanArrayOf(false, true, false, false),
+                        booleanArrayOf(false, true, false, false)
+                    )
+                )
+                TetrominoType.J -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(true, false, false),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, false)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(false, false, true)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(true, true, false)
+                    )
+                )
+                TetrominoType.L -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(false, false, true),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, true)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(true, false, false)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, false)
+                    )
+                )
+                TetrominoType.O -> arrayOf(
+                    // All rotations are the same for O
+                    arrayOf(
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, false, false, false)
+                    ),
+                    arrayOf(
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, false, false, false)
+                    ),
+                    arrayOf(
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, false, false, false)
+                    ),
+                    arrayOf(
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, true, true, false),
+                        booleanArrayOf(false, false, false, false)
+                    )
+                )
+                TetrominoType.S -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(false, false, true)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false),
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(true, true, false)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(true, false, false),
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, true, false)
+                    )
+                )
+                TetrominoType.T -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(false, true, false)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false),
+                        booleanArrayOf(true, true, true),
+                        booleanArrayOf(false, true, false)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, true, false)
+                    )
+                )
+                TetrominoType.Z -> arrayOf(
+                    // Rotation 0°
+                    arrayOf(
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(false, false, false)
+                    ),
+                    // Rotation 90°
+                    arrayOf(
+                        booleanArrayOf(false, false, true),
+                        booleanArrayOf(false, true, true),
+                        booleanArrayOf(false, true, false)
+                    ),
+                    // Rotation 180°
+                    arrayOf(
+                        booleanArrayOf(false, false, false),
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(false, true, true)
+                    ),
+                    // Rotation 270°
+                    arrayOf(
+                        booleanArrayOf(false, true, false),
+                        booleanArrayOf(true, true, false),
+                        booleanArrayOf(true, false, false)
+                    )
+                )
+            }
+        }
+    }
+} 

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#000000"
+        android:pathData="M0,0h108v108h-108z" />
+</vector> 

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    
+    <!-- T-Tetromino -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,36h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,36h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M60,36h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,48h12v12h-12z" />
+    
+    <!-- L-Tetromino -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,60h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,72h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,72h12v12h-12z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M60,72h12v12h-12z" />
+    
+    <!-- Subtle glow effect -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,36h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,36h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M60,36h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,48h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,60h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M36,72h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M48,72h12v12h-12z"
+        android:alpha="0.1" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M60,72h12v12h-12z"
+        android:alpha="0.1" />
+</vector> 

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,234 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/black"
+    tools:context=".MainActivity">
+
+    <com.mintris.game.GameView
+        android:id="@+id/gameView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <!-- HUD Container - Score, Level, Lines -->
+    <LinearLayout
+        android:id="@+id/hudContainer"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_marginTop="24dp"
+        android:layout_marginEnd="16dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <TextView
+            android:id="@+id/scoreLabel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/score"
+            android:textColor="@color/white"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/scoreText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="0"
+            android:textColor="@color/white"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/levelLabel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/level"
+            android:textColor="@color/white"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/levelText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="1"
+            android:textColor="@color/white"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/linesLabel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/lines"
+            android:textColor="@color/white"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/linesText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="0"
+            android:textColor="@color/white"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+    </LinearLayout>
+
+    <!-- Next Piece Preview -->
+    <LinearLayout
+        android:id="@+id/nextPieceContainer"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_marginTop="24dp"
+        android:layout_marginStart="16dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <TextView
+            android:id="@+id/nextLabel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/next"
+            android:textColor="@color/white"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+
+        <com.mintris.game.NextPieceView
+            android:id="@+id/nextPieceView"
+            android:layout_width="64dp"
+            android:layout_height="64dp"
+            android:layout_marginTop="4dp"
+            android:background="@color/black" />
+    </LinearLayout>
+
+    <!-- Game Over overlay -->
+    <LinearLayout
+        android:id="@+id/gameOverContainer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/black"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <TextView
+            android:id="@+id/gameOverText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/game_over"
+            android:textColor="@color/white"
+            android:textSize="24sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/finalScoreText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:textColor="@color/white"
+            android:textSize="18sp" />
+
+        <Button
+            android:id="@+id/playAgainButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="32dp"
+            android:background="@color/transparent"
+            android:text="@string/play"
+            android:textColor="@color/white" />
+    </LinearLayout>
+    
+    <!-- Pause overlay -->
+    <LinearLayout
+        android:id="@+id/pauseContainer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/black"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <Button
+            android:id="@+id/resumeButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:background="@color/transparent"
+            android:text="@string/resume"
+            android:textColor="@color/white"
+            android:textSize="18sp" />
+            
+        <LinearLayout
+            android:id="@+id/levelSelectorContainer"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:orientation="vertical"
+            android:gravity="center">
+            
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/select_level"
+                android:textColor="@color/white"
+                android:textSize="16sp"
+                android:textStyle="bold" />
+                
+            <LinearLayout
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:layout_marginTop="8dp">
+                
+                <Button
+                    android:id="@+id/levelDownButton"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:background="@color/transparent"
+                    android:text="−"
+                    android:textColor="@color/white"
+                    android:textSize="24sp" />
+                    
+                <TextView
+                    android:id="@+id/selectedLevelText"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:gravity="center"
+                    android:text="1"
+                    android:textColor="@color/white"
+                    android:textSize="24sp"
+                    android:textStyle="bold" />
+                    
+                <Button
+                    android:id="@+id/levelUpButton"
+                    android:layout_width="48dp"
+                    android:layout_height="48dp"
+                    android:background="@color/transparent"
+                    android:text="+"
+                    android:textColor="@color/white"
+                    android:textSize="24sp" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/settingsButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:background="@color/transparent"
+            android:text="@string/sound_on"
+            android:textColor="@color/white"
+            android:textSize="18sp" />
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout> 

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon> 

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon> 

app/src/main/res/values/colors.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="black">#000000</color>
+    <color name="white">#FFFFFF</color>
+    <color name="gray_dark">#222222</color>
+    <color name="gray_light">#CCCCCC</color>
+    <color name="transparent">#00000000</color>
+</resources> 

app/src/main/res/values/strings.xml

@@ -0,0 +1,15 @@
+<resources>
+    <string name="app_name">Mintris</string>
+    <string name="game_over">GAME OVER</string>
+    <string name="score">SCORE</string>
+    <string name="level">LEVEL</string>
+    <string name="lines">LINES</string>
+    <string name="next">NEXT</string>
+    <string name="play">PLAY</string>
+    <string name="resume">RESUME</string>
+    <string name="pause">PAUSE</string>
+    <string name="settings">Settings</string>
+    <string name="sound_on">Sound: ON</string>
+    <string name="sound_off">Sound: OFF</string>
+    <string name="select_level">Select Level</string>
+</resources> 

app/src/main/res/values/styles.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Base application theme -->
+    <style name="Theme.Mintris" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <item name="colorPrimary">@color/white</item>
+        <item name="colorPrimaryDark">@color/black</item>
+        <item name="colorAccent">@color/white</item>
+        <item name="android:windowBackground">@color/black</item>
+        <item name="android:textColor">@color/white</item>
+        <item name="android:fontFamily">sans-serif</item>
+    </style>
+
+    <!-- No action bar theme -->
+    <style name="Theme.Mintris.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowFullscreen">true</item>
+    </style>
+</resources> 

build.gradle

@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext.kotlin_version = '2.0.0'
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.9.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+} 

gradle.properties

@@ -0,0 +1,26 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true
+
+# Set Java Home to Java 17
+org.gradle.java.home=/opt/homebrew/Cellar/openjdk@17/17.0.14/libexec/openjdk.jdk/Contents/Home

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = "Mintris"
+include ':app'