🟦 Tetris

📖 How to play Tetris

1. 4-block pieces (tetrominoes) keep falling. Place them so you don't leave gaps.
2. Keyboard controls: ← → move, ↑ rotate, ↓ soft drop, spacebar hard drop. On mobile, use the buttons below.
3. When you fill a complete row, it disappears and you score points.
4. The more lines you clear at once, the more points you get. Every 10 lines you level up and the speed increases.
5. You lose if the pieces stack up to the top.

💡 Tip: leave one column free on a side to place long pieces and clear several lines at once.