Shift Lite is the iPhone version of the popular Web-based Flash game Shift, a traditional, puzzle-based platformer with a twist. In Shift, you traverse a stark black-and-white game world to the beat of a jazzy, noir soundtrack, jumping over obstacles and grabbing keys to activate platforms that let you "escape" into each progressively more complex level. You use touch-screen buttons to run left and right, and you press both buttons to jump.
The twist in Shift involves the black-and-white game world: puzzles on each level often require you to hit the "Shift" button (or you can just tilt your device) to invert the level--so instead of a white figure running through black space, the environment flips under your feet and you become a black figure running through white space. This clever, Escher-esque variation makes for some fun and interesting gameplay, although Shift Lite is relatively short and doesn't offer much repeat play value. Fortunately, a low-priced paid version offers an additional 25 never-before-seen levels.