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

Release notes:

In this new version, the background colors change every 2 seconds until you press reset to start a game. You can see that before you start a game, there is a blank space where the cpu score goes and a 1 where your score goes, That is the game variation number. Variation 2, which in not in this version will be 2 player.