Nice! I really enjoyed the jumping/flying mechanics. Usually jumping/flying with this much gravity is really bad to control, but something about this made it feel good—especially being able to press down to fall quicker. This was a difficult game, but didn't seem unfair. Didn't collect any of the coins, but finished in 1,016 seconds, I think.
I thought the game could use music, even just a simple ambience, it helps make it feel more polished.