Controls really nice and feels pretty fluid, very nice! it was an enjoyable experience to play.
The artwork is really cute and charming, especially Dana herself, although i felt that the enemies were lacking a bit.
I really like the wave system with an announcer for each wave and the audio design is pretty good.
The only real critique i have is that its lacking a lot of the explanation, the top bar shows when you are supposed to switch colors but i never figured that out in the middle of the action, only after i stopped playing and started a new run looking at the visuals, i was confused mistaking the lives for the bullet clearing bombs, the UI could have more indicators to them. Having the controls showing somewhere inside of the game would have also been nice.
You are supposed to use the color switching to your advantage, doing more damage to enemies of the opposite color and not taking damage to bullets of the same color, but i just ended up playing the game as a normal bullet hell trying to avoid everything and just shooting without paying attention to the colors, it would have been nice to have more of a visual indicator for these mechanics, maybe showing bullets that wouldn't damage you being evaporated on hit, or bullets that make more damage creating sparks or an effect on hit, but this may be more of a skill issue of mine with the genre.
Overall it was a very nice little game with a lot of cool concepts and visuals, Congrats!