Hi! Thank you for bringing this to my attention! It has been three years and I haven't made a proper guide yet. I will link the guide over here but for now several clues to hint that you are in the right direction :
Correct choices will have an sfx like a chime. Some choices does not lead to a 'good' or 'bad' ending, but rather which 'good' or 'bad' ending you'll get.
You also need to nail the QTE events. If you fail any of the QTE events, that is an instant bad ending. (especially the last one, it will actively drag your mouse down so take that as a guide on what you should do)