I'm so annoyed at this game. Yes, you can play for free, but I'm sick of games starting well, then just become a way to make money. You start off with each part of the story needing 1 gem, after around 100 levels when you're invested they then need 2 gems (3 at times) and then you get a hard or super hard level every few games rather than 1 in 10. The "normal" levels also become difficult, yet the rewards stay few & far between. I'm sick of it! Why can't we just pay 1 price for the whole game?