According to the creator of the game, the majority of players die, along with the rest of the world.
I'm not sure (and I haven't seen clarifying remarks from the creator), but it seems likely that not everyone else died. Notice the trees in the park are green again.
http://www.newgrounds.com/portal/view/555181
It needn't take more than 10 minutes to play, though it might if you nail-bite about your choices. I'm curious about the LW response, although I might be underwhelmed by lack of interest.