Recently bought an iphone. Now looking for good games. I'm not particularly looking for anything overhwelmingly cartoony. Well that's not fair to say, I just want something with a bit of thought put into it. For example, I like Plants vs Zombies but I can't stand angry birds. Get the picture? Now I'd prefer it to be free, but I might, MIGHT be willing to spend money if it's especially good. Recommendations?