A classic bullet-hell boss fight game! I like the theme though the description was slightly confusing.
This game definitely nails the "fun" part, all of the bosses were very hard without being too hard, and the whole game was just the right balance. I do think a big thing that subtracted from it was the fact that you have to constantly be rapidly clicking to deal damage and kill the boss before time runs out. Although the game is really fun, it COULD do with a bit more juice/polish
As for audio, well this game has none, so I can't really talk about it. The visuals are incredibly creative and look great, so congrats on that! They might not be the flashiest, but they're very consistent, which is important. I think on the aesthetics aspect, the game could do with a tad more polish, and by that I mean audio.
For theme, this goes for a more "boring" approach with a limit on time, but I think it still works well and fits.
To summarise, very very fun game, cool theme, neat art, but suffers from lack of audio and needs the ability to fire by holding down.