
Sounds like Sonic's jumped on the Doodle Jump bandwagon. Can you play as Tails? That's who I'd play as.
If you like that and Doodle Jump, you should try Pac N Jump. It's a Namco themed version of the same kind of game.
I like Ridge Racer, but I don't know if I could do it on an iPad. They should make a Ridge Racer Jump. :) I don't know how that would work, though.