Jack and Jane appear to be a bit bored at work. They have taken to throwing paper balls at each other. Why don't you pick one and give them a bit of a helping hand. To help Jack or Jane click on one of them from the menu. Once you have click down with your left mouse button. The longer you keep the button held down the farther the paper ball will travel. Try to get a paper ball to hit Jack before he manages to get one to hit you. If you don't like the character you are playing with simply go back to the main menu and click on the other character.