Hi Nic.
Thanks for the feedback. The responses do affect the music, which adapts to the emotional tone of your answers. The narrative, however, does not branch, so I see what you mean.
Our thinking in terms of the theme is that the procedure is one that takes control away from the protagonist, as hinted towards in the dialogue. Also, since the narrative all occurs mid-procedure, it is too late to take it back, so that lack of influence over the narrative and the protagonist's fate was our approach to the theme.
Thanks for taking the time to play and comment!