Onyx Stone

Onyx Stone is a classic falling-block puzzle game with a polished gem style.

Seven classic tetrominoes drop into the well. Move, rotate, and drop them to fill complete rows and clear them from the board. Clear four rows at once for a high-scoring Tetris with a special flash effect.

Features:
- Classic block-stacking gameplay with smooth controls
- Buttons and gestures: swipe to move, tap to rotate, swipe down to hard drop
- Next piece preview and ghost landing projection
- Scoring for 1, 2, 3, and 4 line clears, with rising speed as you level up
- Lock delay for precise last-second moves
- Lock particles and line-clear flash effects
- Synthesized sound effects and background music
- Best score saved on your device
- Pause, restart, and game over screens with a clean custom design

How long can you keep the well from overflowing? Stack smart, clear big, and beat your best score.