Great platformer! I'm not very good at platformers, so it was very difficult for me, but I love the idea of spin jumping to navigate platforms. I do think it might be a little too punishing with one hit from an enemy sending you back to the start, but also if that was the type of game you were going for, then that's ok. One thing to note though is the music does not loop, so I would suggest fixing that if possible. Good job!