I love the aesthetic, and that music is great. It really set the mood. Every jump is a leap of faith, you can't see where you need to jump or what's down there waiting for you. A peek mechanic could fix this. The pcg levels didn't have any variation or intrigue. It looks as if they're based solely on perlin noise. I bought a heart from the shop but didn't notice my health increase, which makes me think it might've been an extra life thing? If so then that's a bit confusing, I was on my last bit of health and needed it pretty badly, was a bit disappointing.
Great job on the game!