The VO work is top notch - it sounds great with the effects as well.
I love the art work, the animation, and the shifting animation looks amazing. You've nailed the atmosphere with the artwork, music, and sound effects.
The gameplay is fun and engaging, the only thing I wish was a bit different was that you didn't require 100% to become a skeleton again. It might have been a specific choice, but I would rather be able to swap at like 80+% so if you mess up a wall jump or something you don't need to backtrack as much to collect the powerups! Very fun game!