As you may have noticed, I am a bit of sucker for addictive games on the iPhone. First DoodleJump, then Wordcrasher, and now NuoNuo (iTunes Link).
NuoNuo is a game similar to Doodle Jump, but instead of the platforms being there for you already, you need to create them. This is done by simply tapping the screen where you want your NuoNuo to land. The lower down the screen the higher he jumps. It sounds pretty simple, but in reality it is a lot more tricky.
I have been playing NuoNuo for a while now, and I can only get up to about 3000. The NuoNuo also eats acorns and magic mushrooms as he goes up, which gives you a couple of extra points. All in all a well rounded game, and at a measly $0.99, it should keep you occupied for a couple of hours/days/weeks :)