Intelligent Qube is played on a three-dimensional plane called the Grid. The puzzle consists of 3D Qubes that tumble from one end of the Grid to the other. There are three different kinds of Qubes: Normal, Advantage, and Forbidden. The object is to mark and destroy only the Normal and Advantage Qubes, and to avoid destroying Forbidden Qubes. You mark squares on the Grid and as the desired Qube tumbles over a marked square, you can cause that Qube to sink into the Grid, destroying the Qube and thereby scoring points.