I finished Gold, thanks to Voltgloss discovering how to fix the BASIC source code. One line in particular
9310 LOAD
should be
9310 SCROLL
It’s possible to do this fix even on the online emulated version. Just quit the game (with X, then Q) and type the “9310 SCROLL” line and hit ENTER (or NEWLINE as the keyboard puts it). You don’t actually type the letters S C R O L L but rather the letter “B” which types the word all at once. Then, typing GOTO 1 (“G” gives a full GOTO) will restart the game with the fix.
This indicates that the command is being stored as a single byte so this is likely just a corruption from dumping the tape (like Scott Adams’s name being misspelled on the version of The Golden Voyage I had).
Leaving off from last time, I couldn’t get east of a particular cliff without the game crashing. Actually taking the route…

…led to a “treasure room” next to a locked door. This locked door turns out to be the same as the one I couldn’t open before (even with a ring of keys) but unlocking the door works from the other side, and landed me to the north of the bridge where the gold was stored. So this represented an alternate way of reaching the gold:

I assume there’s a better way of drawing this out so the crazy-connection up top isn’t necessary.
I’m unclear if this really had anything to do with reaching the end of the game, but since I knew I was no longer even potentially stymied by a bug, I went to work trying to figure out where the wraith stored the gold after hiding it “well”. Since the character is clearly based off the pirate of Adventure hiding treasure in a maze, I took the guess the same thing happened here, and went for the odd three-dead-end-room spot I mentioned last time:

Got it in one! However, the prior exits blocked off were still blocked, so I started wandering in case another random event came up. As part of my wandering I tried entering the laboratory, thinking something different might happen rather than getting kicked out; indeed, instead of a laboratory there was a room with the “rumbling bowels of the earth”. (Voltgloss theorizes this triggers the second time you get the gold, I haven’t tested enough to be sure.)
Heading on from there leads to a small maze which I didn’t even bother mapping but just wandered hoping to get lucky, and then a dark room:

I was thusly deposited at the entrance past the obstacles and able to escape!

I have no idea if this is the max score. If it is I reckon the contest-givers assumed 103 would be an unlikely guess for a final score, so only someone who won would find it.
I don’t have much else to comment on, other than it is quite curious how closely this game resembled Quest in structure: go in to find a treasure also purely by navigation, get the entrance blocked off (at least two different ways), get the treasure stolen (to be recovered in a dead end) and only find a true exit in a maze deeper in the map. I don’t think it’s genuine direct influence (although there were a few Commodore PETs in England at this time, there were not many); rather, both authors were riffing off of Adventure, and when boiled down to its fundamentals of navigation, the twin ideas of “require an alternate exit” and “have a pirate-like figure steal the treasure” become natural ways of adding a smidge of plot to the proceedings. After all, Adventure itself had a gold treasure that was too heavy to carry up stairs, and required an alternate exit to get it back to the starting house.

Via zx81stuff.
Hilderbay Ltd was founded in 1979 and claimed in a later ad that their first product was for vacuum tube computer. Their software held to a general theme:
- Critical Path Analysis
- Stock Control
- Mortgage + Loan
- Payroll
- Simple Word Processor
- Statutory Sick Pay
- Kempston Centronics Interface S
Somehow, amidst all these utilities and business software, they produced a two-pack game cartridge for the ZX-81: Pick a Word and Gold. (No name is attached to any of them, although they did publish a short book attributed to Andrew Pennell.)
YOU AND I MUST PICK 1 OF THE 9 WORDS DISPLAYED IN TURN. THE FIRST TO GET THE SAME LETTER 3 TIMES WINS.

For example, if you can pick KEN, CRIME, and PEST, you win the game, since they all have the letter E. I admit I don’t know what the optimal strategy is, but the game claims on difficulty level 2 the best you can do is hold the computer to a draw.
Now, this is All the Adventures, not All the Computer Renditions of Tabletop Games (although here’s a link to play Pick a Word online), so what really interests us is the other game from the set, the wildly obscure Gold, which does happen to be listed on Mobygames, but under the category Compilation where nobody can find it. I came across it by browsing the website zx81stuff more or less at random.

The game is one of the surprisingly few from this era that ditches having a parser (see: Quest, Adventure in Murkle); even games which clearly stretch the machines they are designed for include the tried-and-true two word (or some multi word variant).
This is partially just cultural inertia — after all, strategy games of the time, from Oregon Trail to Taipan, were perfectly comfortable with menus. Even Japan started with a parser, even though the Japanese language doesn’t mesh with the two-word standard so well, and they started getting creative with menus when forced to by constraints. (Adventure in Murkle in particular also drops a parser due to be stuffed into a tiny 4K of space.) There’s design issues, too, but let’s get exploring now and save discussing them for after–

The map as I managed to get it. I can’t say it is the “complete map” for reasons I’ll get to.
As implied by the opening screenshot, your objective is to grab “a huge treasure”, and you are limited to direction commands, Get, Leave (drop stuff), and Open. As expected, a great deal of the gameplay consisted of just wandering around, and since the game doesn’t bother to specify exits, you have to test N/S/E/W/U/D on each and every room.

My first time through. I tried to get the strongbox if I couldn’t unlock it, thinking I could tote it around. Note that the way to specify an item is simply to list the first letter, so I was spoiled as to the existence of Sapphires when I was really trying to get a Strongbox. Somehow the game managed to make an almost-no-verb setup feel awkward. Also, the “man-eating spider is not here” message is going to become important.
The keys for the strongbox above are nearby, and inside the box are the sapphires, so there’s not much suspense in finding them. Most of the room descriptions are the standard “imagine what a random fantasy cave might look like” form…

…except for this part.

You get looped if you go into the laboratory back to the place you were in. “Pale, sightless creatures” is an interesting phrase; not common enough to be a clichĂ©, but standard enough it shows up in that exact order in a number of books; ex: “Aidan had expected a dark, dreary place, one fraught with jagged edges, cold pools of water, and pale, sightless creatures.” When is a turn of phrase too stale, however colorful it may be?
Structurally, the game lets you meander in a fairly straightforward way to the northwest corner of the map and grab the “gold” of the title, just past an ice bridge (with a locked door I’ve never managed to open). Where things get interesting is when you try to get out.

The front exit has two routes, but they are both blocked off as shown above. (Quest did the exact same trick, where once you found the treasure you couldn’t go back the way you came.) A third exit through a trapdoor doesn’t allow you to fit the gold through either. Wandering back to see if I missed anything, I had a wraith steal my gold.

I’d love to talk more at length about how even with extremely limited actions available the game managed something of a plot structure, but things cut off right here — I haven’t gotten farther, and with the current extant copy, I don’t think I can. That’s because one exit — east at the “sheer wall” quoted earlier — is the only one I haven’t tried, but it crashes the game. It is faintly possible I missed an exit on my map, as has often happened before, but I did treat things quite systematically. The only hitch is the dead ends.
One way a number of these games saved on space is to have rooms in mazes have a simple “Dead End.” as the description. It allows tossing in a bunch of extra navigational headache for the player without much more work for the author. On my map I started marking the dead ends as “cut off” exits because it took too much space to keep adding the rooms:

Two rooms right at the entrance. The “Turning” has a dead end going west and a dead end going down.
I started testing exits on each dead end just in case they weren’t really dead ends (The Tarturian did this trick) but after about 10 or so with no luck I just started assuming every dead end was real. Then near the end of my mapping I came across this by accident:

Yes, going east from a dead end didn’t say that direction was impassible, but rather, took me to a new dead end. However, the result was just a multi-dead-end as opposed to a new secret area. It is still faintly possible one of the myriad dead ends holds something genuinely interesting, but because of the crash on the cliff exit, I don’t have high confidence the game is winnable as is.
Or if “winnable” is even the right way to think about it. Early issues of Your Computer advertised a contest:

If you can’t find it amidst the messy text, the ad is promising the one who sends “the highest score” by 31 July 1982 will win a “64K Memotech” (a memory expansion pack). I have been unable to locate any results, but it may mean the high score is a little fuzzier than the average for this time period. (How did they keep people from cheating, anyway? You get 1 point for each room visited so there’s not a lot of “impossible” scores as long as you pick something reasonable.)
Gold still exists as an interesting specimen of trying to make an adventure with limited flexibility of action. It’s also somewhat astounding how awkward it still is to control; the specify-objects-by-their-first-letter system is somehow worse when it fails than a parser. “I didn’t understand that” — fair, I was trying to take an spiderweb but it was just an item of decoration — “I don’t see any sapphires here” — what? The first seems like intransigence but not fatal, while the second is a straight error, and made me feel uncomfortable in my actions, like I wasn’t getting a real treasure, but a fake virtual one that sets a variable flag.