I really like it! It's a cool inversion—maybe not strictly a role reversal, though :p —that you've come up with. There's a genuine concept to explore. However, I find it a bit demanding to ask the player to exit the room in addition to saving the victims within the given time. Moreover, I get the impression that the most important thing is to save the civilians... isn't it? That's what I enjoyed the most, rather than having to run towards the exit afterwards. Apart from that, it's a great proposal. Bravo!