I also agree that having the google doc worked well for us to picture what was going on. Although the puzzle was a nice starter, I did actually have to sit down with a piece of paper and plot it out, which is what you want.

Having played both games, I was also surprised that what I thought might be coming wasn't QUITE what was going to happen. Which means you made it different enough for people who played the games to not be able to predict what's coming.