Swing your sproingy blue orb to destroy other blue orbs moving. Be careful, because not all orbs are safe some of them that is not blue will harm you and lowers your health.
Swing your springy blue orb into the hollow orbs while avoiding all solid orbs. Hit orbs together for score bonuses. Left click to fire weapons (once purchased) and z/x or mouse wheel to select weapons. [esc] or [space] to pause (or quit) the game. Sound controls are on the main menu and in-game tips are provided.