Woah this game is great! I'll start saying I couldn't beat any of the bosses, I found them pretty hard, but that's not a problem about the game (I'll try again later probably). The bosses are extremely well thought out, and I was pleasantly surprised by the amount of different attacks and animations for each one.
The controls feel good and are easy to pick up, only thing I feel is maybe each character could use their own additional movement options: because of this, the cockroach is probably the strongest character between all of them, as he has the one ability that most resembles a dodge.
The art is nice and consistent, making the game feel really polished.
I liked the roster of playable characters a lot and the fact that each one has their own strategies, but as already said, I feel the cockroach is the only one that is truly viable. I'd like if characters were expanded more, maybe with other different stats or ways to complement their playstyle.
The only true criticism I have is, I feel like the theme of "spin" wasn't really implemented (some bosses have spinning attacks but other than that, I feel like this is a classic bossrush).
But a great game overall! Feels polished, and feels fun! Great job! :D