Bubble Cannon 2
Shoot the bubbles from the cannon and make them collide with each other.
Use the mouse to aim and fire.
Each bubble show a number on it which indicates how many times it has to collide before it is removed. After a bubble has burst a new bubble is loaded in the cannon. If you fail to remove enough bubbles using the given ammunition, it is game over.
Bubbles need to collide with bubbles of the same colour.