Maybe its one of thhose games in which they hardly give you anything at all. (only of those other games , i think its how to make a vidoe game or something, in which they tell you what to have, and show you exaples of game, it is divided up into many parts.
I say 1/5 because when it says the flying castle helps you out at first I though that the castle would actually fly and help you kill zombies, but when I saw the ending cutscene. It wasnt what I thought I was going to be