Point your cursor in the direction of which way you want it to. It won't go left or right, so try to touch it by slicing side to side, like you would in fruit ninja. P.S. If the ball touches the black line at the bottom, you die. P.S.S. If it does touch the line, press the green flag 3 times, then you'll be able to play it again.
Thanks to the tutorial, I was able to do this, so thank you, tutorial!