PILE
This minimalistic puzzle game requires you to match colored blocks to keep the screen clear and score big combos.
Colored blocks line up at the top of the screen in sets of two. You can swap blocks within their sets and slide them left and right to match them with the blocks below. But keep in mind that the clock is ticking, and if you don't place your blocks before time expires, a new row will automatically be added to the screen. The game includes four power-ups, and leaderboards via Game Center.