Nice idea! I didn't quite feel I had control of what was going on - like I didn't want to kill those people, but it was presented as if I chose that. Also, since I got the keys before I talked with everyone - I wasn't able to hear their part of the story. And I think it can be fixed with some action like pressing yes/no upon interaction. Also, the music stopped after some point - not sure if it was intentional.
That said, it's a nice idea and has a nice ambience. It had a vibe of "12 angry men," especially at first. Well done!