Damn, when I saw that drawing on the top, I thought you one-upped me on polish. Apart from the obvious (adding animations, particles, sounds), I'd just say maybe don't show the stork when 'jumping' downwards, since you're already falling anyway, and what's up with the jump immediately when you walk off a cliff while in the ground state? I personally don't think that should happen. Maybe coyote time would be better.
Anyhow, I'm sure everyone else will take care of the deserved compliments, so well done!