Here there is an iPad compatible game (Branes Battle).
The growing community has a very good atmosphere and the administrators are close to gamers.
The story is inspired by the String Theory. A strange dimension has been discovered by a bumbling mad scientist, where tribes of Branes abound, controlling the very material of the dimensions.
Graphically, much of the game is in sharp contrast of black silhouettes with splashes of bright color, which gives the game a striking and memorable look. 2D visuals with the foreground predominantly in black, multi-layered backgrounds give the illusion of depth. The art style is already used in a lot of other games: Insanely Twisted Shadow Planet, Feist, world of goo, Patapon, Outland, Nightsky, etc.
Have a nice day