Tetris

Pieces use a 7-Bag randomizer (all seven tetrominoes per bag, shuffled). Hold and the next three pieces are shown in the game panel.

Ghost shows the landing preview. After touching the stack you have ~0.5s to move or rotate; up to 15 move resets extend the timer, then only stepping down extends it.

T-Spin bonus: if a T locks with a rotate as the last move, the corner heuristic passes, and you clear lines, you get an extra +400 × current level on top of line clear score.

Line clears: 100 / 300 / 500 / 800 base × level for 1–4 lines; hard drop +2 per cell dropped. Every 10 lines cleared raises the level (max 15). Score and level appear above the playfield.