Expensive upgrades. It was good in the beginning. Worst now. Opened lot many chests, each hero has over 500 points but what is the use when upgrades are too expensive. Even platinum chest gives petty coins. Coins earned from wins, chests should be proportionate to upgrade costs. How much ever I try, player who upgraded with money wins. If I cant upgrade my heros, game is quite boring. Stupid rigged game !