I got this and must say its another great but overlooked game on the appStore. At $1.99 its a total bargain. There's at least 3 hours of game-play in the story mode alone and once you get used to the spinning mazes it's a heck of a lot of fun.
If you liked Labyrinth or Monkey Ball but want a faster, more arcade approach Rock'n'Roll will be good for you. Plus there is a really funny intro story that made me laugh!