The left stick runs: push it up to jump, or tap JUMP, and again in the air for a double jump. The right stick aims, and shoots while you hold it. A bunny gives you autofire.
The boss takes 50 hits. Every minion is 50 points and every hit on the boss 10, and when the boss falls it leaves 10 keys. Three hearts; a fall off the level takes one.
A and D run too, W jumps too, Z shoots at the mouse, and holding the mouse button keeps shooting. P or Esc pauses.