Stay sharp by playing Space Blocks.
Space Blocks is a box-based puzzle where you try to remove all of the blocks by chaining adjacent ones. Chains only work horizontally or vertically but not diagonally. Blocks sit on a grid that is 5 blocks across by 5 blocks across. For added difficulty some blocks need to be chained multiple times in order to be cleared.
You can play casually or competitively with other players.