Remember the puzzle that had square tabs numbered 1-15 inside a 4x4 square? The idea was to shift the tabs around until you had them arranged in numerical order. Well, that game was just an appetizer for this new mind bending experience. Now it's a real 3D cube! That's right, you can spin and turn it while you try and figure it out. Not only that, we respect your mind power abilities and have included a feature to allow you to create your own patterns for the ultimate challenge!