Very challenging and relaxing for your mind it is something I play everyday well recommended to other who would like to try it out. Only thing is to much ads just want to play with all the ads with install games that are no really my taste, sometimes some of these ads sticks and I have to close the whole thing over again, not so nice and another thing is asking for real money for the coins but not everyone can afford to pay,maybe it should have other options to enjoy the game without interfaces