Use arrow keys to move the left dot and use W, A, S, D to move the right dot. Press space to serve the ball. To change the color of the background press 1 for Green, 2 for Greenish-Blue, 3 for Turquoise, 4 for Blue, 5 for Dark Blue and 6 for Black.
This is one of the games on the Brown Box, a prototype video game console. Credit to Ralph Baer (1922 - 2014).
