Each player has four arrow keys which control the direction of his/her moving arrow. You may move in any direction except direct reverse. The object of the game is to hit the box and score the number of points it shows.
If you hit anything but a box you may lose points or your opponent may gain points. Caution - if there is no box displayed and you hit the border, your opponent, or yourself - your opponent will score * 1000 * bonus points.