Bit of a bulky download but it gets good reviews.
CALLING ALL OGRES! The official game of DreamWorks Animations’ Shrek Forever After™! Be a “Real Ogre” as you explore, fight, scare, race and fly through 11 visually-stunning 3-D levels as Shrek, Donkey and Puss In Boots! It’s an epic tale of Love, War, & Sketchy Contracts!
Compatible with iPhone, iPod touch and iPad. Requires iOS 2.2.1 or later