You really should take a look at The Act, even if you're not a gamer you'll likely find the hand drawn animation charming and the play mechanics refreshingly different. It only took us just over a hour to complete and a couple of the play sequences (the term 'levels' just doesn't seem appropriate here) were most frustrating, but ultimately it's a satisfying iPad experience.
The Verge recently ran an article recounting the entire 20 year development of this interactive comedy. Though The Act isn't earth shatteringly exciting, we're so pleased that it finally found a good home on the iPad.
App Store Link: The Act