Great fun! It was actually kinda challenging to get to the "score" screen after some time.
Game over! Lifetime coins: 5352240996.00 cards lost: 233 mins played: 72.26 round reached: 168 share this in the comments for bragging rights!
No, I meant the challenge was getting rid of all cards. There legendary card that beats all others except itself but it actually beats itself if it has higher level. So I found I had to (after being very ahead in the game and upgrading this card to a quite high level) let the game catch up with me again and for there to be a card that beats mine :)