Just finished it, pretty interesting. It was very clear to me, right from the beginning, that the character had some sort of serious mental issue(s). Having another person's skeleton inside you is absurd.
Then the game continued. I started by attempting to return home, which wasn't possible. So I took some X-rays, beginning by investigating the feet. I saw that they were nonsymmetrical, and that the character had options for various choices explaining it, ranging from absurd conclusions, to the more obvious answer that it's just normal body variation. I realized here that her definition of "another person's skeleton inside me" differed a bit from what I thought it meant; she was only referring to a few particular body parts.
Throughout the game, I picked the choices that were the most logical explanations and usually chose ones that indicated a realistic scenario (such as previous injury or abuse), rather than picking weird choices indicating some alien/government conspiracy. Although, a few of the things were particularly genuinely concerning (a chip embedded in her hand??).
Then the time came to pick a conclusion, and obviously, I went for the one where she realizes that she has mental problems and needs help. After explaining to the person on the phone that she understood she was delusional, she asked the person to come get her. And then, suddenly, her interlocutor walks in, wearing some creepy apparatus (reminded me of the torture gear on suitors in Amnesia: Justine), and I suddenly realized that I had perhaps misjudged this universe; our character may not have been delusional at all. And I just made choices that convinced her that everything was ok... Who was this person, and what was going on? How did our character end up in this situation?
I was pretty shocked and a bit scared. If this weren't just a short experiment, it might make a good introduction to a horror game.