Great game. Nice original concept with switching the colors to have different weapon types.
Controls were a bit rough. I would of liked to be able to get a weapon without taking damage. The sprites with the color scheme used made the stages and enemies a bit hard to see a lot (Especially the very very tiny bullets). (I played in original 96x96)
Also ran into a bug(?) with being able to leave boss rooms when they were already active and hurt.