I think that the game speed should be increased, it laggs gradually more and more over time.
The toturial should be better, what about a test match?
The last thing is that the touch of doom doesn't work if the enemy player changes card and then changes back to it.
 "BoomsticK"){kind=icon}
 "Achievement Unlocked"){kind=icon}
 ":the game:"){kind=icon}
 "99 Bricks"){kind=icon}
 "SHIFT 3"){kind=icon}
 "Distopix"){kind=icon}
 "Escape from really boring island 3"){kind=icon}
 "Soul Core"){kind=icon}
 "Fantastic Contraption"){kind=icon}
 "Tactical Assassin 2"){kind=icon}
 "Frustration"){kind=icon}
 "Kongai"){kind=icon}
 "Blood car! 2000! Delux!"){kind=icon}
 "Newgrounds Rumble"){kind=icon}
 "The Fancy Pants Adventures"){kind=icon}
 "Dolphin Olympics 2"){kind=icon}