User Summary: The basic idea of StarCannon is to shoot down enemy ships as they come towards you, avoiding enemies and their bullets while firing and collecting powerups, with the prototype ship "Nova Ray". Enemies will continue to attack throughout the level until the boss is reached. Bosses shoot masses of bullets and have shields that take a considerable amount of firepower to deplete, as well as a health bar. Survival in StarCannon is often a matter of evading bullets and tactical use of your shields.