It is a game where two people hit each other's numbers.
The winner is the winner.
There is also a computer game. (It is weak)

When playing against Bluetooth:
The first opponent will need to find a device.
If one chooses “First partner to find” and the other chooses “Find first partner”
The pairing certificate will be displayed, and if you accept both, the match will begin.
The opponents that can be connected will be displayed from the second time onward, so the battle will start if you select it.

During online matches:
A 4G line is required. It is not possible with wifi.
First register the user. (There are no items to enter)
From the second time onwards, you can play as a registered user.

If you change your smartphone,
Display the user ID from the menu on the smartphone before change
Enter the user ID on the user registration screen on the smartphone after the change.