Those actually aren't arcade machine ROMs. They're arcade game parodies in the format of interactive fiction, also known as text adventures. The .z5 files are Inform (Z-Machine) games, and the .gam files are TADS games. You need an interpreter like Zoom to play them.
If you're unfamiliar with...
The creator of Tetris Max is holding a contest this Saturday to crown the game's world champion:
https://www.bigmessowires.com/2023/09/29/announcing-the-tetris-max-high-score-contest-october-14/