is a falling block game
. A plus-sign shaped cross of five blocks will appear at the top of the screen. Using the arrow keys on the keyboard, you can move them left or right, drop them or rotate them ninety degrees. The object is to create crosses like the shapes that fall, only all the same color. This is not as easy as that simple explanation makes it sounds. The problem is that the cross will not stay together when it lands. Where ever the cross lands, if any part of it has no support below it, those parts will continue to fall until they land. Just keep making crosses until the stacks reach the top, then it is game over.