You have control of the ultimate weapon-the Laser Cannon. Use your cannon to destroy all of the monsters in each level using the least amount of shots possible. Each level will increase difficulty and present a new puzzle forcing you to figure out how to kill the enemies in the level. Sometimes you may need to collect battery life that controls your Laser Cannon's ability to shoot a more powerful shot in order to break through a wall or push a metal box onto a very important button. The less shots you take the more stars you will earn at the end of the level.