Click on the newest ball and drag your mouse to the scoring zone. Once you get over the scoring zone let go of the mouse. If the ball goes off of the screen, click the space bar to make it go back to the center. If you get a combo over 10, your score will be multiplied by 2.
If the ball has a "s" on it, it will go fast. If the ball has a "b" on it, it will be bigger.
(Q to quit)