Wow the sound-design really fits the game, good job! Especially that the sound gets more if you get more people to follow you.
I like how you created this game out of the theme. It was actually pretty fun to play and the only thing I would criticize is that it took me very long to find the last person before I could run into the building. Maybe you could have added an arrow or something which is pointing to the nearest person like the arrow at the end.
Nevertheless a very succeeded game :D