The entire point of text based games is for the author to use writing to create an immersion and connection. It is art and requires intention from the author to be meaningful in any way. If they can't even put in the effort to write it themselves there is nothing the author has to share that is worth looking at.
Sorry to be so harsh, but it would really just be super boring regardless of how fast it generates or what it comes up with just because there is no intention behind anything. Even if the author has a unique idea, the AI is what is expanding on it, so there isn't actually any meaning or connection to any of the other ideas.
Maybe make a different kind of game? A game that relies on writing made with AI is not attractive at all. I think the person who replied a quiz game has a good idea, but even then that is something you can code on your own.