Interesting discussion. There is more to the MC's insanity than perhaps you are aware of - anyone reading the code could tell you what scenes activate and at what 'level' of insanity.
Hopefully there are enough clues in game to ascertain just what parts of the story are effected by this machinic (it's not just Emily, though she is a large portion of the .. symptoms).
To address the behaviour point
Qixoni made. To the person afflicted, the world around them would appear normal, their interactions are normal - an insane person rarely believes themselves to be, insane. Rather, as far as they are concerned, they are acting 'normal'.
Without spoiling things, I can only say there's a lot more to come from the higher levels of insanity. Some of it more subtle, some of it (
like the interactions with Cassie in the sauna) not so subtle.
Thanks for the feedback.