I'm not sure what actually goes wrong but this game is getting boring for now. New players would say it is a great game, but without powerful upgrades, you will get nowhere to beat the super players. I use to play it everyday and complete missions but some game modes are very difficult for my level as I'm just an average player so now I just login to get daily rewards and stop playing altogether. Even paid money for this will not make you a greater player unless you've had so much to spend.