Tap any tile that nothing is covering. It moves to the tray at the bottom.
Three of the same tile in the tray clear. The tray has 7 cells — fill all 7 without a match and the run ends.
Dimmed tiles are covered: clear the tiles on top to free them. In the side piles only the top tile can be tapped, and the tiles under it stay hidden until it leaves.
You get three helpers, once each per run. Undo returns your last tile to the board. Move out parks up to 3 tray tiles in the hold, where you can tap them back in later. Shuffle mixes the tiles still on the board.
Clear every tile to win. Finish without helpers for ★★★. Daily is one shared level that changes every day.