Divide players into two teams.
The object of the game is for Team Asteroid to throw their foam ball and hit Team Planet's soccer ball. Team Planet controls their ball by kicking it around, trying to keep it from Team Asteroid. Team Asteroid players are not allowed to take any steps with their ball. Instead, they must pass it to teammates, trying to get it in the hands of a player close enough to the planet for a shot.
When the foam ball hits the soccer ball, the teams switch roles.