I had loved this game. At some point all you will do is lose. Then it's apparent that the game is made to force you to use real $$. Enjoy adds or get few rewards. PVP play has players actively cheating & the games rules make no sense. Do the most damage maybe you'll lose. Keep out all the enemies & lose. Co-op play has 5 keys/day, sometimes players disconnect & it wastes your keys. Creators- quit being greedy. How much money do you really need to make off of us?