Really brilliant game, I would definitely replay to try and get all the achievements (Although some of them look like they'll be pretty hard), Really the only complaint I have is that there's no visual indicator when houses are damaged if they're overpopulated, So you need to mouse over them or click on them to see, Although I suppose that's partially my fault for having everything be overpopulated (I didn't want to kill everybody!).
(Also would be nice if at the end it told you how long it took; It definitely took me more than 30 minutes!)