This is a cute game! The music is nice (just a bit too loud and the loud isn't perfect). The controls could be a bit smoother but it's manageable. The trees look great, but the collision on them is a bit random, you can go through it sometimes and sometimes you can't.
I read in the comments other people could upgrade the character, but I couldn't figure it out. Maybe a gameplay video could help so I could figure it out myself :p
I just ended up floating around and collecting stuff, which was kinda relaxing