" I know somebody did embark upon a project to run Zork on his WP-2, and apparently succeeded, although there is not enough information shared on that project to reproduce it AFAIK."
I've never run it but if there's a program file, and maybe a data file it shouldn't take anything more than loading both via LaddieAlpha or NADSBox and running the program file. Running 3rd party programs is a documented feature of the WP-2, and how to make the binaries is covered in the programming manual. I adapted Camelforth to run on it once upon a time. -- John.