Little White Bear Studios‘ match-three game, Compression, is available for free today as part of FreeAppADay.com‘s promotion.

Compression employs the usual match-three mechanic by requiring you to spin, slide, and drop colored blocks via touch controls in order to match three or more like-colored blocks in a vertical or horizontal row.  When accomplished, those pieces will be removed from the game board.  The goal of the game is to remove all hollow blocks from the game board before you run out of space, and that’s where the twist comes in.

Compression‘s game board is, well, constantly compressing.  Every third piece dropped will move a wall inward.  You are able to identify which wall will be moving via three white dots.  When the dots are gone, the wall moves.  This little twist also requires you to plan ahead since pieces will be pushed together, possibly helping or hindering you in your quest.

The game features unlimited levels thanks to randomly generated game boards, unique techno-ish music, and OpenFeint integration.

Compression is normally available for $.99, but today only (1/30/10) it is available for free.