We think so.
We just updated the instructions. In order to play you need two users at least the first one is what we call the "Zombie controller" it is capable of manipulate the zombies actions but it wont show up until a second player appears. You can adda nother player with another browser or an incognito tab of chrome.
It still doesn't work. I used two browsers now for players 1 and 2. I saw player 2 appear in the player 1's map but I wasn't able to move as player 2. Player 1 never appeared. I wasn't able to click on player 2 from player 1's map.
Thanks, appreciate your vote and the comment.