They use a laser-targeting system to shoot each projectile at two or more matching heads connected on the field to remove them from it.
The player receives similar head projectiles in the cannon via a clear, plastic tube. A player must stop the aliens by shooting the heads of Borbs and Lumps inside of a playfield with a cannon. Bubble Town is a bubble-shooting game about the lives of the Borb Bay Borbs who are fighting an invasion from a mysterious, strange alien race known as the Lumps.