- Enter the correct answer in the blank by pressing the keypad on the screen to get points!

- Basically, you calculate addition, subtraction, multiplication, and division with two numbers, but if your score increases, you have to calculate addition with three numbers.

- Fever mode occurs when you stack more than a certain number of combos. Fever mode can increase your score even more

- You can have more fun by comparing your score with other players through the ranking and increasing your rank.

- Background sound, sound effect, and vibration can be turned ON or OFF through the setting window, so you can enjoy them to your liking.

- If you don't like the nickname, you can also edit it in the settings window, so don't be disappointed if you made a bad nickname. Duplicate nicknames are possible, so please write the nickname you want.