I know I'm late to the party here, but AaAaAA! by Dejobaan games, rocks!
I got it for $2.50 off of steam today. Let me tell you, though, it's worth an order more than that. This is simple, visceral yet unique gameplay. It's a reflex-challenge not matched by any other game (except maybe 1...2...3...KICK IT, another Dejobaan game)
Anyone who wants to experience future extreme sports 1,000 feet in the air should try this, also maybe if you like flipping off people on walkways who don't like you.