Description Bubble Cannon is back and a little trickier this time. Can you pass all 10 levels in this fun physics skill game? Instructions: Collide bubbles of the same color to pop them. The number on each bubble indicates how many more collisions it needs before it pops. You have a limited number of bubbles, be careful not to run out! Each bubble you pop adds another one to your bubble queue so they key is to keep popping them to stay in the game.