Sure, I’ll highlight some things.
I’m not saying these are necessarily bad or wrong. They would be fine in an old school style game. That may be just what you want for this.
However, an important pre-design decision should be;
Is this going to play like an old school game from the 1980’s or like a modern game?
Random
- Why would plugging in a plant to a radio change its tune? Maybe the plant is an antenna, but this is not mentioned.
While you are fooling around on Magrathea, Zaphod gets fed up and disappears in the Heart of Gold to go somewhere really fashionable.
So Zaphod was around before this. Where is he? What is he doing? Can you talk to him?
Once in the 2nd class, you can enter the kitchen, and get the wine and Gargle Blaster.
Who’s there? Any chefs? Doesn’t anyone stop you wandering in the kitchen taking things?
Once you have the towel, you are able to enter the 1st class area (the guards believe you are a waiter)
While also wearing a dressing gown?
(once the Blaster is mixed with the wine) you can serve the drink to the 1st-class Idiot
Where is the clue to mix the drink? Otherwise presumably you always fail giving either the wine or the Blaster.
If you did it correctly, he will pass out and drop his card, which you can take and use to go to the car park.
Where are the clues that you have to get the card and that he has it and that you have to spike his drink?
You feel an urge. LISTEN TO URGE, or waiting 4 turns, tells you what the urge is.
What clue to “listen to urge” ?
Missing/Not Mentioned
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How exactly do you get to the restaurant?
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As a waiter with a Gargle Blaster, can you give this to Zaphod?
Bad Outcomes
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What happens if you’re driven insane. Is this game over?
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You don’t initially know you have to close the satchel quickly, then;
you are taken to the non-time Prison, and because of the dangerousness of non-time prison, you die quite quickly.
the special word if it is said anywhere else, you have some text about how you could not have known the word, and God, in a fit of rage, attempts to believe he does not exist, and in a fit of rage, brings the universe down with him, killing you as well.
Sudden death just testing the magic word?
you must speak the philosophical word to the computer. If it is incorrect, you lose (but you can’t. three tries or the machine breaks, sending sparks into your face and killing you)
More sudden death.
Old School Feel
you can sneak through the door to 2nd class, with the right timing.
But you have to quickly close the satchel
timing puzzles.
To get these frobs, you are given (by Slartibartfast) a bug-fixer, and told to find the combination needed. Asking the computer gives it to you (349). Then, (you have to do 3-4-9) every time you turn the numbered dial to the next correct number, something changes
Combination locks.
An object appears, which you can use. 40% chance that it is a key, to open the weirdbox in the cupboard. 40% chance that it is a strange claw,
Randomization
the word, which is MRHUG, but MRKUG is also allowed, for reasons of cartography. Once you reach another area, you can say the special word
XYZZY stuff.
Hope this helps. I don’t want to appear too critical.
Best of luck with the project, which is most interesting.