LinkSame reconstructs MacLinkSame, a popular PPC Mac OS X application (which itself turns out to be based on the traditional Shisen-Sho). All you have to do is spot a pair of tiles bearing the same picture, such that the center of the tiles can be connected by a path consisting of one, two, or three straight line segments, where no segment of the path crosses any other tile. Select both tiles to remove them from the board. Proceed in this way to clear the board, one pair of tiles at a time. Play for fun, or try to beat your previous score by making your selections in quick succession.