I found Caster, which is a cool 3rd person shooter game, in which you use different spells, and some spells deform the land (you can raise it or lower it) and you invest points into your "build" (so you can increase your spells, or how fast you run etc)
I haven't bought the game ($4.95) I only played the demo, but its pretty fun, and I might get it on my iphone. (Shouldn't be the same price as the computer versions, but i'll see.)
I suggest just playing the demo if you want something to do.
-Caster-
Mac/PC/iPhone
http://www.elecorn.com/caster3d/