Fun game in the beginning, but you quickly get to levels that cant be won with out boosters. The boosters cost the gems and the gems cost real money. On top of that the gems are expensive and get used really fast. You will ultimately find that the only way to progress is to keep dumping money into this game. No thank you! The makers say that every level can be won without spending money, but they are absolutely lying. Dont believe me, play the game and find out for yourself. Good luck lol