I can't stand the color challenge and the inability to play with the decks I put together for 20/25 battles where you force me to play cards the way you want me to literally in the order you want me to with only slight chance for personal choice. I think it's disappointing to have me not picking cards to work with and then instead of getting to buy the cards, having to spend the money just to participate in playing to earn to then pay for the cards. It also crashes between matches, forget it.