Based on the web version :
Balance is shit.
It's one thing to make the game hard, it's another to make the second boss summon so many fucking mobs that you have to spend MINUTES cycling around the room just to stack them all together, so that they won't block your projectiles and you can actually hit the boss.
Other than that, the game is extremely repetitive, doesn't have any invulnerability frames (meaning you can go from 100% hp to dead in less than a second if a mob ends up on top of you) and has the stupidest concepts of what's "masucline" or not (spitting in a pit isn't manly, it's morronic).
Unfun, unfair, and in its current state, it's bad enough that I'd call it unplayable.