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.
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:
10 CLEAR 32767: LOAD "samflate.O" CODE 16384*28+8192: LOAD "secret" CODE 16384*14 20 CALL 16384*28+8192, 16384*14, 32768 30 SAVE "auto" CODE 32768, 390781, 32768
Note that there is a floppy disk installer available from the Stars and Sprites page which essentially does that described above.
A DOS friendly conversion has been done by Richard Gadd for ATOM and Trinity ethernet interface systems which allows loading and saving of the config file to the same record where the game files are located. A full installer is available at the Stars and Sprites page.