Pls do not play , this game is like pay to updgrade charachters .the most valuable currency is bucks in the game and at Max level u get 2 bucks per chest and then too to open a chest u need to win 3 times . Earning coins is very hard and also other currency , and upgrades are so costly in it . I have been playing since 1 and half years and I can't even upgrade till the half of the levels so pls pls pls do not install . Very annoying game . I do not recommend