Press the "Start" button to start the game. You will be taken to the explanation screen, but you can move to the main screen of the game by pressing the "Next" button that appears there.

There are 5 cards (1,2,3,4,5) at the bottom, but if you tap any of them, the opponent's card will appear in the upper right. Compete between the number on the card and the number you choose, and if it is large, "Win !!" will be displayed, and if it is small, "Lose !!" will be displayed.

In order to actually compare the size, you need to press the "To Battle" button that appears after selecting your own card. After that, a button called "Again" will appear, but tapping it will return you to the beginning of the main screen and you will be able to select your own card again.

To return to the first screen of the app, press the "To Start" button at the top right of the main screen.