Cool platformer! The music and art are well done and the mechanics feel nice. I also encountered the bugs listed by other people before me, but I also found another bug where the player can jump when touching the side of a wall/block. So for example, I could scale up a wall by just pressing jump instead of having to jump on other platforms to get there. I'm assuming this is a bug unless santa has been practicing his climbing skills haha. Overall I think this is well done, good job!