Mahjong Dimensions 15
The object of the game is to remove the tiles that are two of the same kind, and only those on the outside of the cube or other 3D blocks. Tiles centered between other blocks cannot be removed, only until you have removed the blocks. And if you think you're stuck, turn the cube to reveal more similarities. You can also shuffle all the blocks in random order if you have no other option to continue in the game.