Your goal is to connect four blocks of the same color. They don't have to be in a line, they just have to be connected. Rotate groups of four blocks by dragging your mouse in an L-shape across three of them. The direction you drag determines how they will rotate. Each time you move a block its number decreases by 1. If you move a block with a 0 on it, you lose. Go for a high score before running out of moves!