It's a simple game where you just press the numbers in order, but you need to look ahead in order to keep pressing them in order.
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1. About difficulty
This game has 3 difficulty levels to choose from: Easy Normal Hard.

2.Game content
The game is explained below for the Normal difficulty level.
Press the numbers in the order of 1 =>2 => 3 =>4 => 1.You can also press the same number repeatedly as follows:
1 =>1 =>1 =>2 => 3 => 3 =>4 => 1 =>2 =>2 =>2 =>2

At the start, you can press any number.
The next number you can press is the number next to the number you pressed before, either vertically or horizontally.
When you press a number, the previously pressed number disappears and the place is filled with other number. Therefore, the numbers in the matrix are constantly changing.

3. End of game
If there is no number that can be pressed next, it will end.
Even in the middle of the game, you can end the game by pressing the end button.

4. About the score
If you press a number, 1 point will be added.

5. High score registration
If the score is higher than the high score, the score will be registered in the high score at the end of the game.
You can delete the high score by long-pressing the high score value.