Drag the ball around and press the button labeled "Shoot" to move the ball in the direction of the triangle. If the ball hits the bar, it will go in the direction which is the most realistic. If you want to reset the position, click the button labeled "Retry" that was in the place of the previous button. If you click on either the ball or the bar, it will ask you for your preferred direction and point in that direction (unless it's invalid).
Nobody. You hear me? NOBODY. I don't know how that title got there, and I'm too lazy to change it.
