Darts! Click the green button ounce to stop the X bar and again to stop the Y bar. You can change the color of the darts to throw by pressing the UP and DOWN arrow keys; you can see what color will be by looking at the thingy at the top left. It will get laggy if you have too many darts on the board. To pull off a dart, click on it. SIMPLE! By the way, this works well in fullscreen!