Vong stands for “Vertical Pong” and is a Pong game for Atari 2600.

Release notes:

Here is yesterday’s version. The score goes up to 15 now, and the paddle and score of the first person to get 15 flashes for about 2 seconds and there is a sound efect.

http://www.atariage.com/forums/index.php?showtopic=123455&st=50