I was hoping for a straight answer. If there are endings which require perfect answers for each choice, then there's like 18 choices to make and almost 2 million combinations.
So it's going to be pretty unlikely for anyone to find these true endings that's mentioned.
Oh yeah, it would also be nice to have a restart button. At the end, it's all black with no option to restart so the page needs to be refreshed and the game reloaded. Would be a nice quality of life feature :)
Also when Olivia gets angry and the game restarts, it would be better to go back to the home screen instead of looping back at the start. With the current bug of the background not changing, it's really confusing.