Another great time-waster!! This game is all about geometry & how well you can visualize - hence, The Eyeballing Game. The best way to figure out how the game works is to simply play it.
The game works by showing you a series of geometries that need to be adjusted a little bit to make them right. A square highlights the point that needs to be moved or adjusted. Use the mouse to drag the blue square or arrowhead where you feel it is 'right'. Once you let go of the mouse, the computer evaluates your move, so don't let up on the mouse button until you are sure. The 'correct' geometry is also shown in green, so you can see where you went wrong.