Defend your snow fort against the other kids by throwing snowballs at their fort. Press the left and right arrow keys to move back and forth along your fort's wall. To duck and/or pick up a snowball, press the down arrow. To throw a snowball, press the Spacebar. The longer you hold down the Spacebar before throwing, the harder you will throw. Try to hit the other kids as many times as you can while avoiding their snowballs.