And I know the guy who wrote it, in fact I still work with him. Tom Nelson, who can craft code like a work of art.
If you like playing these games, I definitely suggest giving Begin a try.
(Why 'Begin'? Because in the progenitor to this game, in BASIC, on an HP2000 there was a maximum code size. Large programs had to be written in pieces and 'chained' together in modules. The modules were numbered but the first was called 'Begin'.)