Narrow the playing field to collect points. Don't touch the ball.
There is a spinning ball on the playing field. And you are trying to narrow the playing field. If the playing field gets narrow enough, you get 1 point, the playing field expands.
How many points can you collect? Are you in for the contest?
It is an extremely simple and enjoyable game. Aimless game to pass time.
Divide the playground, right, left, top or bottom. You're in control. Just split the playing field without touching the ball.