You're really out here testing my knowledge of color combinations!
The multi-mix enemies are tricky to juggle.
I got as far as the first couple batches of black and white enemies, I think their concept is pretty neat.
I think some sound effects would go a long way for player feedback and game feel. The projectiles could also be a little faster, they seem to move the same speed as the player, meaning if you move towards an enemy while shooting, you'll take damage first.
Thanks for sharing the game!