This is a very simple but fun game.  You are the grey ball.  Other balls zoom around you and try to push you around.  If they knock you into the wall you lose.  You need to move your ball around to avoid hitting the other balls or control the collision when you are hit so you don’t go bouncing into the wall.  Of course you need to control yourself as well because the faster you move to avoid the balls the more momentum you have and the easier it is to accidentally slide into the wall without being hit by anything else.

The controls are very simple, just use the arrow keys.  This is definitely a game that’s worth checking out and playing around with.  It’s probably not something that you’ll spend hours with but definitely worth 10 or 15 minutes of fun.