The game has many endings (like 16), but it is short, and the ending depends on the fellow travelers you pick up and where you go.
Dialogue happens like this: your fellow traveler or you speak in phrases, and if you start a dialogue, then you can choose which phrase to start with, but there is a time limit during which you need to choose a phrase.
I won’t hide it. I myself only played through a few endings, and I can say that the game is easy to play, not stressful.
If you have it lying around from the distribution, then why not play and just relax.