This card game app is "speed". You go out one after the other card in the number of difference and one card in the middle. And I compete which one do one's card before you against the CPU.
There are four levels of strength of the CPU. There is no so strong and "Easy" and "Normal", but in the speed of the hard, "Difficult" will come out the card one after another in the ultra-high-speed to become a "Very Difficult". "A" and "K" are linked.