In a beautiful forest glen a hovering cube awaits. Do you dare challenge it with your puny brainpower? Use Ctrl + Click to clear a cell. Use Space to freeze a cube. Use Mouse Wheel to switch the selected color. Link every pair of similar colored markers to complete a Cube. You cannot link cells diagonally. If you break an existing link reselect the color of the broken link by clicking one of the two markers then plug any gaps. Black cells are blocked.