Limbo is available on the App Store
Limbo is like nothing you've played before. You are this kid, that somehow just wakes up in the forest. The graphics are dark and creepy, but in a beautiful way. Backgrounds are magnificent. The sound is exquisite. You then set sail on a journey, which we do not want to spoil. Limbo is a 2D side-scroller with numerous mini puzzles along the way: you will run into traps, huge spiders, creepy habitants, abandoned hotel signs, dams, and for a game that looks so simple, you will suffer some nasty, wicked deaths. Everything, and we do mean everything about this game is exceptional.
Make sure you grab it for your iOS device from the source link. You'll be thanking us later.
source: iTunes , Limbo