It's pretty fun. I wrote a Zombie Dice Simulator while waiting for it to arrive. Had to adjust for actual number of green red and yellow dice (originally a guestimate).
definately fun for a quick easy game, esp with family over that you don't want to have to explain a bunch of rules to. For us adults, you can also place bets before each game
Lets also not forget the zombie dice drinking game I just thought up. 1 shot for every shotgun you roll.