Really, not even one star. It started out okay like every game then everything turned into buying more energy and gems and all new levels, the tiles get more and more expensive so you can't keep going unless you buy. If you create more space in your camp and when you do, everything in the game changes like going through many underground tunnels for nothing but expending your resources. DON"T INSTALL, I REGRET HOW MUCH MONEY I HAD TO SPEND JUST IN THE VERY BEGINNING OF THE GAME.