Move around the maze, seeking the being given to you as a target. The Left and Right keys make you turn round anticlockwise and clockwise respectively (you can use the compass in the corner to help yourself get aligned) and the Up and Down keys make you move forward and backward.
When you intentionally bump into your target being, ten points gets taken from them and given to you. However, when you intentionally bump into a being that is not your target, five points get taken from you and given to that player and you suffer the indignity of being teleported to some random location...
To make things more fun, you can also send messages to the other players in the maze. Just type it in and press Return to send it off to everyone connected...