Goal: Survive, score points, and defeat the boss at 30 and 60 points. After that, face recurring bosses every +60 points.
Move: Move your mouse left/right to steer the bunny.
Shoot: Hold Left Mouse Button to fire. Release to stop firing.
Lives: You start with 3 lives. You gain +1 life when advancing to the next level.
Invulnerability: Brief safety window at the start and after getting hit.