iTunes를 열어 App을 구입하고 다운로드합니다.
Time to use your brain!
There’s a number in the upper left corner. Numbers keep falling down. Your job is to get rid of the numbers before they get to many and one of them reaches over the top. You get rid of numbers by calculate the number in the upper left corner and then press “Crunch”. You can alternate between addition and subtraction.