This game is very fun... However, when I find myself spawned on, killed instantly, I don't really like that. If you could make it so that it is impossible to be spawned upon, or a newbie mode where it is impossible to be spawned upon, that specific, incredibly annoying flaw would be taken care of. Yes, I know that some levels are supposed to take advantage of that element, like wave 8. But it's really, really annoying!
The only bad thing about this game is that it isn't accurate. Can Zombies run? No. Do zombies turn animals? No. Can zombies wield weapons? No. Could one person hold out for that long without sleeping? No. Are nights that short? No. Can zombies attack during the day? Yes. But as far as the game is concerned, I loved it. 5/5