Pick one of three pieces. The ones you skip stay for next turn.
Drag it over the board and let go. It falls straight down from where you hold it until it hits something.
Fill a row to clear it. The rows above shift down as a whole.
Keep room to move. The game ends when none of your three pieces can fit anywhere on the board.
Build combos. Clear rows again within three placements to keep a combo going. Each combo step adds bonus points, and emptying the whole board is worth +500.