I wish I could give this game a higher rating, and I was about to, until I came on to play one day. It no longer works properly and the problems have not been fixed. It's been around 5 days of this nonsense and nothing has been done.
Basically, I was going to say what everyone else did. It would be better if the enemy that you already gathered all their costume parts would just disappear and be replaced by another one.
 "Bloons Monkey City"){kind=icon}
 "Curl Up and Fly!"){kind=icon}
 "StrikeForce Kitty"){kind=icon}
 "Viking Valor"){kind=icon}