When you tap Go! the sand dollar will start changing shapes and play music. When the music stops, the shapes stop as well. Tap the matching shape in your row of shapes as fast as you can. Don't jump the gun, because if you tap the wrong shape, the game is over. Practice for when you play head-to-head. Stats are kept on your fastest time and your average time. When playing single player mode, all settings other than sound effects are disabled; End Score is set to 10 and Randomize Shapes is On.