This game is great for a while, but make sure you have plenty of patience, time and real money. I have had it on my phones for several years, but the frequency of super hard levels increases, boosters don't help and so I end up not playing for weeks, months or even uninstalling it. I always thought the idea was to keep players playing thus increasing the chance they will make a purchase, but when it becomes too difficult, too often, it becomes just too unpleasant to play.