This may be old news, but I wanted to play Zork on the X16 and couldn't find it here.
Anyway, there is a online tool that will compile the ZIL code into X16 code. You just choose which game you want, set some options and download the game. Worked nicely for Zork 1 at least, and there are a few others in the drop-down menu (or you can supply your own file):
https://ozmoo.online/
Zork and ZIL based text adventures
Re: Zork and ZIL based text adventures
There are also a bunch of modern, really good text adventures, built for the X16: viewtopic.php?t=7705