Nice game ;) Suggested improvements: Add some kind of increasing difficulty, increasing pacing. There is a bug, where enemy can "hit" you and remove you health, but it doesn't disappear (but does not "hit" you anymore) Also, a shooting sound is too loud, compared to background music ;) You have a game with complete gameplay loop, nice menu (even after game over, you can still get back to menu and play again) - for a game made in 3 days - really good!