Wow. Gorgous art, amazing, smooth animation, wonderful sound design. The jumping and gliding mechanic felt really fun to play around with, and the level design was perfectly suited to the few mechanics on display. I don't think I've ever been able to compliment a Game Jam game on its pacing before, but you managed that perfectly too!
I'm not sure if there's anything bad I can say about this game. I guess I got a little lost towards the end, but I never reached a point where I was completely stuck.
I would be astonished if this wasn't among the top ranked games for this jam, if not first place.