Good, but...
...far too easy. In a sequel, if one comes, I'd like to see the whole "searching for supplies" thing brought to it's full potential, by having to scrounge for food and even ammunition. It would make the game harder without necessarily having to make the zombies more difficult to put down.
Other than that, it was great fun. Made it through all 20 nights on my first go. Loved the clown.