Pang is a classic cooperative two-player arcade video game. The game was published as a secret on the cover disk Stars and Sprites of Sam Revival issue 25 - to see it, press the Break (NMI) button during the lissajous screen.
Screenshots
Tips
To play the game without waiting for Star and Sprites to run every time, copy the "secret" file onto a new disk, copy the SAMflate code on as well, and run: