Kingdoms and Castles is an addictive little city-building game that is very nicely done. In the opening screen, the clouds let you know that the programmers enjoyed writing this. The basic idea is simple enough: Build a city hall, start chopping wood, add a hovel, build a farm, and so on. However, almost everything that you build creates ongoing employment that is equal in priority to new construction jobs. In other words, if your town has more job openings than people (which seems to almost always be the case) and you start building an archery tower because a dragon is coming, you'll need to temporarily shut down something to get citizens to come build the new thing that you want. They won't do it automatically. Overbuild and lose your balance and the hysteresis effect can oscillate out of control, leaving you with a starving population, empty stores, and no defenses while Viking ships approach to burn your stuff down. I liked it, though I did want to punch the advisers after awhile because they wouldn't shut up about nobody being available to build stuff. Not one crash in 6 hours.