i got into crypto kitties myself but also important to note that they are clogging the ethereum network , luckily ethereum team has a solution read here .
https://steemit.com/ethereum/@ajkapss/microraiden-payment-channels-are-now-live-on-ethereum-main-network#@newguyintown/re-ajkapss-microraiden-payment-channels-are-now-live-on-ethereum-main-network-20171206t065921986z