The player pilots a claw-shaped ship that can shoot independently of where it is pointing. The primary objective is to destroy a variety of enemy shapes which attempt to destroy the ship. Depending on the game mode, extra lives and extra supers can be collected upon achieving a certain number of points. Supers can be chosen before the game starts, and are expendable powerups that have extreme effects on the game, such as turrets that shoot enemies and a massive wave of bullets. In addition, several 'drones' may be selected to accompany the player to perform tasks, such as collecting geoms or firing on enemies.[5]
Crucial to effective play is the score multiplier, which can be increased by collecting small green diamonds called "geoms". Skilled players may get the multiplier into the ten-thousands on occasions.[citation needed]