At first its fun easy game, more time you spend and more time you leveling, more tiring it become, you need at least open the game once every 30 min, or you gonna found your fortress moved to rando location and your resources mostly gone or your worker are gone because there no food. Play stright for 32 days(vip count) probly now my fortress lv 16,uninst it 2 days ago while upgrade it, and after 2 days doesnt play i found myself more relaxed, before, i must login or worker left.