It's a simple game. There are only two types of pieces:
First, the ball:
;
second, the players: 
And two types of moves exist:
.
Click a mouse key and a blue ball is added at this place.
(The players are also called "philosophers" because they never move.
You remember the Monty Python's version of "philosophers' football"?)

You can move in all 8 directions and also over several players at once.
The goal of the game is to reach or to exceed the base line of the enemy with the ball.
The first player plays to the top, the second to the bottom of the field.
That's all!