So I played the game through a few times...
In general, it's great. There's a certain meta with the tails that you have to figure out, and after a certain point of powerups, you almost one-shot the boss. The actual animations get a little tiring after you see all of them, with no variation, but
¯\_(ツ)_/¯
Every now and then, trying to fuck from below a soft platform or using an elevator at the corner will teleport you offscreen and you can't move. At that point, the game is soft-locked and you can't do anything anymore except restart. That's why I stopped grinding, and why you can't see me on screen. It's a little glitchy by that token.
Anyways, thanks for the few hours of entertainment. Looking forward to seeing the rest of your games!