Your game didn't fail to amuse me. As soon as I started the game I was in love with the main menu, the effects look so cool. Then the game itself is simple and great. I liked the recoil of the enemies when shot. The music is another good part of your game. Also the red effect when enemy attacks is amazing. It would have been better if you added screen shake effect for shooting as well and also a game over screen would be great.
I really enjoyed your game.