I only give this game one star because I cant give it zero! I must admit this game was fun and addictive, but only initially. Before long you will realize it is IMPOSSIBLE to progress unless you have a bunch of Facebook friends who play, and are willing to spend a bundle of real money. And they are sneaky about it! When you purchase new habitats, you cant open some of them unless you have a lot of fb friends, or are willing to spend gems which are expensive. This is also true of the themed buildings such as the breeding tower once you reach level 25. Once you repair it, unless you spend 25 gems, you cant open and use it! But you are never told these things ahead of time. This is constant throughout the game. One thing I cannot stand about this game is that progress without spending real money becomes impossible. Some games offer progress through spending real money, or you can wait out the progress. Not this game. If you dont spend money, once you get farther, you progress will come to a dead halt! That is absolute greed! I only play this game now to breed dragons. I will not spend one more penny on this game. My advice, steer clear of this game. You will only become broke and aggravated once you start to play.