Shift 2 is the sequel to Shift, a unique puzzle game that uses a Shift button to invert black-and-white objects, letting you walk on different surfaces to try to reach the goal. Though difficult to describe, you'll quickly understand once you start playing, and Shift 2 takes the unique game mechanic to new heights across 120 levels. Like the original, you only have a couple of controls on the bottom for running and jumping, and then Shift buttons on both sides at the top to invert the colors.
To get you started, Shift 2 gives you onscreen hints to get you through the first few levels. As new challenges are introduced, such as the new rotator block in this sequel, the game will let you know how to handle each new element.
Once we got used to the controls, Shift 2 sucked us right in with unique, challenging levels that offer a lot of room for experimentation to reach the door to the next level. Even after only a few levels, you'll quickly see how Shift 2 uses the inverting-black-and-white mechanic to make for interesting challenges, all with an incredibly easy to pick-up-and-play control system. You can even challenge your friends' scores over either OpenFeint or Apple's GameCenter.
Overall, with a unique game mechanic, 120 new levels, new game elements, and the ability to scan bar codes (just like shopping apps) on the developer Web site for new maps, Shift 2 is a great option for those who like challenging puzzle games.