Pong from Blinkenlights: You could use a mobile phone to play the arcade classic Pong right on the house. One started by dialing a number. A bit later one heard a voice explaning what to do. The house stopped its current program and switched over to the Pong playground: two paddles and a ball.
One used the 5 on your phone to move your paddle up, and number 8 to move it down. One were usually controlling the left paddle and playing against the computer on the right. If a second person called the system as well, it got into control of the other paddle so both could play against each other. Once everyone hung up, Blinkenlights switched back to its current playlist.
What do you think about that one Yaz ?
Via We make money not art