Tetris

Classic 10×20 Tetris. Pieces are drawn from a 7-bag (each I, O, T, S, Z, J, L appears once before the bag refills) so droughts never last more than 6 placements. Line clears score 100 / 300 / 500 / 800 × current level; soft drop +1 per cell, hard drop +2. Every 10 lines bumps the level and the fall speed.

On desktop: arrows to move, ↑ or X to rotate clockwise, Z counter-clockwise, ↓ to soft-drop, Space to hard-drop. On touch: tap = rotate, swipe horizontally to move, slow swipe down for soft drop, fast flick down for a hard drop. The four buttons under the board (←, ↻, →, ⤓) work too. Pick a starting level — Easy starts at 1, Medium at 5, Hard at 10. Higher score is better; the round ends when a new piece can't fit.