A lovely little game!
It is short, but has been added was well polished. The animation is well made, the story is there, everything down to the UI was thought and taken care of to fit the game as it should.
Of course you certainly have here and there details you wanted to correct a bit, or had to do some compromise to release the game on time. But you have already achieve something rare in the Jam (and in Jams in general): having a full game.
Yes it needs more levels to be complete, but you already have your beginning, maybe an end, and you can certainly make more levels with the same idea it would not be out of place.
One detail that bothered me a little:
- The difference between background/foreground and actual platform was not clear enough to me. I really just found out I could jump on branches by accident :) Maybe it would be a good idea to enhanced contrasts to make it clearer, or define clearly for the player where you can walk/jump, and where you cannot.
Well done here already ;)