Click the screen to shoot a number bubble towards the cluster at the top. Align the number on your bubble with the same number in the cluster to clear them. Think ahead your shots to create chain reactions for higher scores. Employ the walls to bounce your bubble into hard-to-reach spots. Remove all bubbles before they descend to the bottom line to advance to the next level. Pay attention to the timer in timed modes to sustain your progress. Hone your accuracy to excel in the game.