Good little time burning but it's such a grind, the fact you can't replay mines you've beat means the difficultly never changes, doesn't get any easier the more you upgrade in gacte it slowly gets harder forcing you to consider putting real money into the game, also you gotta watch 1 ad 3 times to get one bonus, you either have ads in the game or in game purchases. . . Having both is an utter scam on the users all so you can line your pockets