Unscramble the pieces of a puzzle, while the picture itself is not standing still! The photo is scrolling over the tiles, so try to keep an eye on small conspicuous features as they move off one tile onto another, to figure out which tiles go together.
The game even has a choice of two different kinds of puzzle: In "Swapping" mode, you can swap any two pieces by either dragging or tapping them. The "Sliding" mode works like a classic "15" sliding puzzle with the gap at the bottom right.
You can choose the number of tiles, the scrolling speed and the scrolling direction. The game comes with six pictures included, but you can also choose any picture from your library or even take one with the iPhone's camera.