Reaktor is a fabulous action puzzle game with great graphics and music. The gameplay is simple, just click on any area in the "core" to rotate and shoot a colored block. Match up groups of 3 or more of the same color to make them disappear. The color you are about to shoot will be indicated by the color of the light in the middle. When blocks are about to be added to the outer rim, you will see colors lighting up the outer shell. Don't let an area stack up too high or you will lose a life.