I liked it.
I love the art style you went with. It looks great and really fits the game. The music was a bit repetitive and while it fit the art style, I didn't really get any hellish vibes from it if that was the idea.
The platforming part was lovely. Controls were smooth and jumping around with some leaps of faith were a treat. The combat however I felt was a bit awkward and I found myself jumping over and avoiding enemies (which added to the platforming I guess) instead of fighting them.
Overall I liked it but just feel the combat and boss experience could do with a little bit of a rework.