Even if what you said is real the game itself wouldn't actually run on the blockchain as a smart contract.

Cryptokitties is a testament to how pathetic the blockchain is as a platform for complicated games. The fact that possessing a hash representing the genome of a cat is enough to qualify as a game is laughable. I've played lots of highly simplified games that involved breeding animals and optimizing for specific traits and what cryptokitties offered was just one mechanic in an entire system consisting of dozens of interacting mechanics and MMOs like WOW go way beyond a dozen mechanics.