It took me a few loops to figure it out, but the concept of gaining abilities based on how you die it really cool. The art looks good and the abilities fit nicely to their deaths. I was feeling clever when I realized I could just run past most enemies... right up until the boss health bar did it's thing. That was a nice twist. Overall a really strong concept and a pretty fun game.
I didn't encounter any bugs, and the only point of frustration was janitors making puddles right on top of you while you are punching them. Those unavoidable hits encourage relying on the pen, but the pen's slow cooldown (which it should have for balance) makes that a tradeoff between fun and optimal play. If there was more counterplay when fighting janitors it would help encourage a more fun playstyle.