The music and art really fit well with each other, and I loved the loading transitions! Character animations felt really unique, especially jumping and the tilted falling, very nice.
Although it felt it should be confusing at first, character/enemy sprite swaps were actually pretty easy to spot because of how different their movement patterns are, all of this while still keeping the appearance of "chaos". Also, I think keeping the health information away from the player was a good idea, not sure how to describe, but not knowing the health mechanics made the experience more mysterious, making it more tense and at same time giving false confidence to the player.
Overall a interesting yet challenging experience, good job on the entry!