Really nice and creative take on the theme! It was easy to get into the gameplay loop, but difficult to master! As it should be. I also enjoyed the music and the devilish laugh when you died! The look of the boss was also cool. If I'd change something, maybe it would be nice to have a bit more consistent look on the game, especially the bullets felt like some rainbow particles flying around :D but that's only a minor thing!
Check out our game as well, if you have time :)