I was quite impressed by this game - I think it has a lot of potential if you keep working on it! The animations were really solid.
The controls felt a bit clunky/slow at times, especially jump. I would make SPACE = jump and have it more quick/responsive. It was also pretty tricky once I got to the castles, but if you had leveling up or upgrading by using the exp points, then I'm sure this would be resolved.
Nice work!