Cool. Thanks for sharing it! I am going to play. Regarding instructions, I will find my way, but other less computer savvy users might need a README there. See you in USENET!
https://www.ifarchive.org/if-archive/games/zcode/ztrek.z5 English version.
For instance: frotz ztrek.z5
Or Winfrotz under Windows, or Lectrote for any OS.
By pressing '9' you get the online help, in any language. Have fun.