The facebook games.

Now everybody play at the facebook games, like candy crush or pet rescue saga. This are funny games but, can it become addictive? I think yes, because most people play at this games and they don't want to stop. 
Sometimes it's only a hobby to pass the time but sometimes is a really addiction, but normally when you can't pass a level of the game because it's difficultyou search another one. I think that the facebook games are so stupid but many people like it. Sincerely sometimes I play att candy crush game but it's only to pass the time when I'm bored.