You are in charge of a diagonally traveling block. Your goal is to bring it to a complete stop on top of the previous block. This is accomplished simply tapping anywhere on the screen. Because there is nearly no time between your tap and the block stopping, you must time it correctly. If you succeed, you will be rewarded with another block of the same size. If you don’t, the part of the underlying block that is left outside will be sliced off and vanish, and the next block you get will be smaller. If you keep failing to place the next block exactly on top of the previous one, your brick will shrink, making the game more difficult.