Absolutely insane that you made this with just c (and raylib).
You definitely have a good concept here, I'd be curious to see how far you could push it and what kind of platformer you could make.
I wish that dying in a level would just reset that level, rather than resetting the entire game, since it's a bit of a punch in the gut to have to redo levels you already completed just to die in that same spot again. But otherwise it's fairly well put together. Great work!