This is such a cool idea for a platformer! The vibes of it are soooo good too. I had some issues collecting the thing at the end of the first level, it didn't seem to collide with me or anything. So I don't know if I'm missing something else but I did replay the first level like 4 times. I could see myself playing this for hours if it was a full game.
Check out my game when you get a chance!