I like the shift of 3d to 2d which really caught me off guard at first. The story and feel of the game are actually pretty good with it feeling very atmospheric in the 3d scene and the 2d scene being pretty interesting too with the whole heaven and hell levels. Overall, It's an enjoyable game with very nice vibes.
Some feedback I have is that while the 3d looks really good the 2d sprites used don't really feel cohesive. The pixel art background and tile set doesn't mesh well with the more drawn cartoon look of the character, enemies, and UI. I would recommend trying to stick to one style which will really just make it more cohesive and more professionally looking automatically but it gets a pass because it's a game jam game. Also, the character movement could use some more polish with adding more feedback and responsive controls.