Very fun! I really liked how the game looked, and the music is great too! I had a good amount of fun taking really large leaps and jumps, overall felt fun to move around.
For y'all reference found a bug:
You can click on the level up choices multiple times rapidly before it closes out, so you can stack the effects infinitely. Couldn't resist doing that a lot, leads to some pretty crazy effects! Even if you fix it, maybe it'd be fun to add some in-game cheats like that :)