this is a shadow physics engine, move your mouse around to change where the light is, press the up and down arrow keys to change the quality, if its laggy for you, press up, and when the number is higher, it runs better, but press down to make it the shadows less pixelated but it runs less good. press the space bar to cycle between the 5 layouts. - up arrow key for less quality - down arrow key for more quality - space bar to change layout
