Great graphics and mysterious music set the backdrop for this fun and challenging app. In addition, their customer service is fantastic. The latest update offers the option to view ads at strategic points and, if you choose to, you receive game advantages. Alas, I knew this day was coming. The last update crashed all the time and this one won't even open -- probably for anyone in my Society. I'll miss you, Night Prowlers, and I'll miss the game. I wish they would have just left great alone.