Really nice game! I had a lot of fun with the bosses (the hard really got me swearing, and I admit I couldn't beat them, that's a skill issue on my part).
The bosses are overall designed great, and most attacks are telegraphed well (the only one I felt was a bit unfair was the gunbot aimed projectile, that spawned directly on top of the character with no telegraph I could notice while I was meleeing it).
The controls are good, and the rotation mechanic really well implemented and requires quite a bit of strategy of how you position yourself. Only critique I have is on the jumo, as it is not really useful for how short it is, I feel it could be made a bit better even if technically you can simulate a jump by rotating the room in various ways.
I hope this could be useful if you plan on expanding this! :D