Wow that is seriously amazing. That was one of the most original takes I've seen so far I loved everything!
Ok so for feedback, The walking part of the game got stale after a while which ended up making everything else start to feel more stale as I found myself paying more attention to the art and everything around me rather than the gameplay.
I think something you could do to spice it up (obviously I understand we only had so much time and this is amazing for the time allotted) would be to add a story and other things going on between just running such as cut scenes, fighting, etc. Obviously only if youre planning on continuing this project but I really loved what you came up with already and I seriously think you could make this into something even more amazing.
I seriously love the warping mechanic and how you cant spam it so you have to actually be careful with how you use it.
And on top of all that the music and art were amazing. I just started getting into art and I'm very envious that you can create such amazing 2d art!
Overall though I really really enjoyed this game and I can't wait to see what you turn this into and all of your future work :D