Cool idea and execution. I really like the idea of having to leave someone behind.
I think I'm experiencing a bug, however. My first try, I came through the door, and the second room loaded with only the girl. I reloaded and tried again, and this time it left behind the appropriate person, but the next room after that loaded with no one.
I know it's a ludum dare, and maybe not worth fixing, but I thought I'd let you know. Well done.