You can only arrange a field of polygonal shapes in so many different ways--at least, that's the philosophy behind Hexic Deluxe. A kissing cousin of Bejeweled, Hexic presents you with a square field filled with interlocking hexagons. The goal is to arrange like-colored hexagons into groups of three or more, which will clear them from your screen. You can't move the hexagons individually, but you can rotate them at the corners where three hexagons meet; however, the game will only let those rotations stick if it will clear pieces, further limiting the amount of monkeying around you can do.
The game offers several variations on the same concept. There are the self-descriptive marathon mode and timed mode, as well as a survival mode in which, instead of refilling the field every time you clear pieces, you go until you have no more moves to make, at which point the old pieces are locked into place and the field is refilled. Hexic strikes a near-perfect balance of challenge and accessibility, and it's as easy to play for five minutes as it is for an entire afternoon.
