Cannons appear as a purple base extending up and a cylinder attached to the top. There are three green spheres on the sides of the cannon.
Cannons are stationary, not moving at all in the game, unlike enemies like the aliens or squids who move, but are sometimes found stationary. Cannons appear often on the edges of middle of the track, and will constantly firing bullet when they see the player. A cannon can be destroyed with one bug bullet, and will cost the Flash Cat one health point if the cat is hit by a bullet from the cannon or Flash Cat collides with the enemy.