Remove Tetris references and rename to generic game pieces

README.md

@@ -1,11 +1,11 @@
 # pixelmintdrop
 
-A modern Tetris implementation for Android, featuring smooth animations, responsive controls, and a beautiful minimalist design.
+A modern block-stacking puzzle game for Android, featuring smooth animations, responsive controls, and a beautiful minimalist design.
 
 ## Features
 
 ### Core Gameplay
-- Classic Tetris mechanics
+- Classic block-stacking mechanics
 - 7-bag randomizer for piece distribution
 - Ghost piece preview
 - Hard drop and soft drop
@@ -29,7 +29,7 @@ The game features a comprehensive scoring system:
 - Single line: 40 points
 - Double: 100 points
 - Triple: 300 points
-- Tetris (4 lines): 1200 points
+- Quad (4 lines): 1200 points
 
 #### Multipliers
 
@@ -48,15 +48,15 @@ The game features a comprehensive scoring system:
      - 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
+3. **Back-to-Back Quad**
+   - 50% bonus (1.5x) for consecutive quad clears
+   - Resets if a non-quad clear is performed
 
 4. **Perfect Clear**
    - 2x for single line
    - 3x for double
    - 4x for triple
-   - 5x for Tetris
+   - 5x for quad
    - Awarded when clearing lines without leaving blocks
 
 5. **All Clear**