Nice concept. The art, sound effects and music are nice and fit very well with each other. Could have implemented the theme a bit more clearly though. I think there are two main problems with the gameplay, those being the lack of a score system and how chaotic the colors of the bullets are. Score is very important for a game like this, currently I have no sense of progression whatsoever. The color mechanic isn't very relevant because of how unpredictable the colors are and how many are available. Color patterns per enemy, color "parry" VFX/SFX and extra score for "parrying" bullets are a few suggestion I have for improving that mechanic. The gameplay is already fun as it stands though, good job!