This game is about guessing key numbers and unlocking them.

-Simple rules
Enter a number and press the check button to see if the number and position are correct, or if the number is correct but the position is wrong.
Using the judgment as a basis for guessing, guess the key number within a limited number of attempts.
You can easily enjoy this guessing game in your spare time.

-Various game modes
The "Simple" is an introductory mode for beginners that does not include the same numbers in the answer.
The "Basic" mode is one in which the answers contain the same numbers. It is recommended d for those who are a little more familiar with the game.
The "Last One" mode is a special mode in which you have one chance to guess the correct answer from a random progression.
The "Advanced" mode is a five-digit number guessing mode.