Played this game very regularly up until today. Nice graphics with a reasonable grind to advance without cash... but now that I've found that PvP isn't optional, I'll be uninstalling it. Some other games will only make you available to PvP if you opt in or start attacking other players first. This game will allow much more seasoned players to attack your base and steal your resources. Great game if you like being a goldfish in a pond full of sharks.