Good show.
The game play was refreshing; I haven't played this style of game in a long time, which is good. Additionally, the use of three-dimensional graphics are decent and equally refreshing. Through those factors and tons of other small in-game details, I can tell that a lot of work went into this.
On the flip-side, the storyline wasn't anything new or interesting, to me at least. Don't get me wrong, I don't mind the whole zombie thing, but the same tired concepts (escaping, a usually helpful force turned against you, etc.) get thrown into almost any zombie game/movie made since around the time Left 4 Dead showed up.
Story isn't as important in this game's case, I suppose, but It would have made the game more interesting.
That's not to say that the game was bad, obviously, but it could have been much better if you shook things up a little bit as far as storyline goes.