Save Scumm to victory
Without a guide, you will die. A lot. Repeatedly. For seemingly no reason. The other reason to use a guide is that the parser is so obtuse it's extremely frustrating trying to workout what words it wants you to use.
"Look computer" wrong, "Use computer" wrong, "Look machine" wrong, "Look" (trying to find out what word the game wants) [at what?] the game replies. What did it want? "Look screen"...
The game starts with you on a 15 minute timer (providing you don't speed the game up). The (AGI) game does not tell you about this timer.
At one point, progression is locked behind RNG gambling. I ended up watching a speedrun to see how they deal with it (there's a cheat code) to guarantee winning. You can also die to this RNG, by the way