Mahjong Dimensions is one of many Mahjong games released on the computer. This one in particular is a fairly recent game, published on the web by Arkadium Games. The rules in this game are mostly the same as in other Mahjong games, and it uses the same tilesets.
This game is about matching tiles on the conveyor to their counterparts on the board. Most of these require the exact same match, but some tiles can be put in any other on the board, but award bonus points if put on a matching one. The feature that differentiates this game from other similar ones is that the playfield can be rotated either left or right by using the arrow keys, thus revealing another portion of the table.
This game has nice 3D graphics and sound effects, and the added rule-changer rotation helps differentiate it from other similar games. The problem is that it is not too balanced, with the level difficulty being too apart; easy levels are too easy, hard ones are next to impossible to complete.