This game needs a lot of work when it comes to the design.
For some reason, if you choose a wrong answer you get a game over. At least make a scene that portrays why is that the wrong ending, instead of showing the game over screen right as you choose an answer (this happened a lot to me during the time you meet that guy that is pissing himself).
Also, I think you should encourage exploration instead of blocking the path with what you think the player should be heading to next.
If you still want linear progression though, block the path with doors that need unlocking if you want to block the path, or obstacles that are blocked that will need some item to unblock it.