It starts off free to play then if you wanna actually do the puzzles you have to upgrade this that and a load of bull. I'd say the 1st 20-25puzzlea are free. Above that there still free but you will have used all your speed ups by then. Basically a farming game like all the other garbage out there... I want to be able to do the puzzles and that is it, I couldn't give a flying fudge about my castle walls been lvled up nor do I wanna attack other players etc etc, also voices in game r frustrating