Awesome game Daniel!
I love the music, the art, and the asthetic of the game! I also love the progression it makes, teaching you as you go, kind of like "Give Up 2". Just when I felt spikes got boring, you introduced the monsters that chase you, which I think add a much needed feeling of haste. I just wish that they would spawn in a few seconds later; I cant get past one level no matter how hard I try, else I get caught by the demon bat or a spinning sawblade. That's really all I could say against it, along with maybe mix up the design of/ types of hazards, as spike jaws got boring after a while. Other than that, great job for a first official platformer!