Refactor: Introduce ViewModel for score/level, fix game over flow

app/src/main/java/com/pixelmintdrop/MainActivityViewModel.kt

@@ -0,0 +1,40 @@
+package com.pixelmintdrop
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class MainActivityViewModel : ViewModel() {
+
+    // Private MutableLiveData for internal updates
+    private val _currentScore = MutableLiveData<Long>(0L)
+    private val _currentLevel = MutableLiveData<Int>(1)
+
+    // Public LiveData for observation by the Activity
+    val currentScore: LiveData<Long> = _currentScore
+    val currentLevel: LiveData<Int> = _currentLevel
+
+    // Example function to update the score (logic would be moved here)
+    fun incrementScore(points: Long) {
+        _currentScore.value = (_currentScore.value ?: 0L) + points
+        // Potentially add logic here to check for level up based on score
+    }
+
+    // Function to set the score directly
+    fun setScore(score: Long) {
+        _currentScore.value = score
+    }
+
+    // Example function to update the level
+    fun setLevel(level: Int) {
+        _currentLevel.value = level
+    }
+
+    fun resetGame() {
+        _currentScore.value = 0L
+        _currentLevel.value = 1
+        // Reset other game state within the ViewModel as needed
+    }
+
+    // Add other state variables and logic related to game state here
+}