I love it! The visuals, special effects, sounds and music all go together so well! The controls are really tight and snappy and the way you implemented the theme was really unique! The entire game was very polished and well done. The only feedback I have is, since you need to ram into the enemies to kill them (which is really fun), there should probably be some kind of visual indicator when they're about to shoot. Apart from that, great game, no idea how you did this in a week :D