GAME CHEATS A LOT. Requires paying so much to really enjoy the game. And when you are done paying, they find a way to let you pay again and again, by requiring an upgrade in new stages. Also, when you use ads to skip time upgrade, app lags, then the game earns from you while you don't get anything. Only users who are willing to pay can really play it and use good weapons and enter events. How greedy is that??!!