We've been carrying around touchscreen devices in our pockets for years now, but there still aren't a lot of games that really get the tactile pleasure of manipulating virtual objects with your fingertips. Prism, out now on iOS, is a game that's entirely about that feeling. It's essentially a collection of puzzle boxes, 3D geometric objects that you twist and turn in order to get at their high-tech innards. It's a simple premise, but with a sense of style that makes it feel epic and futuristic....
