Sudoku for PC

The Sudoku Game is presented as a 9x9 table, composed of 3x3 subtables called regions, boxes, or blocks. In total there are 81 cells.
The application has a menu located in the upper right part of the screen, to be able to return to the previous screen or exit the application.
On the first screen we have 4 buttons and a central image.
Difficulty: the difficulty will depend on the color icon located on the first screen, the color will indicate the number of cells that will remain with the numbers visible, green being the easiest and red being the most difficult.
Sound: pressing to activate or deactivate the game sound.
Language: each time you press it changes the language in which the help will be displayed, Es, En, Fr, It, De, Ru, Zh, Pt, Hi, Ja.
Help: question button, it is the help for how the application works, when you press it once, the help appears, which will be hidden when you press it again. Hide the help to be able to see the central image, which is the one that starts the game when you press it.
To start playing click on the central image.
Each time you start, a different board will be generated.
The objective is to fill the empty cells, with a number in each of them, so that each column, row and region contains the numbers 1–9 only once.
To select the number to change, click on it, a red box will appear indicating that that cell is selected.
Once the cell is selected, click on the gray box (+), located below the board, to be able to change the numbers. For each click, one will be added to the currently selected number.
Game rules:
1- you must complete the empty boxes with a single number from 1 to 9.
2- There cannot be repeated numbers in the same row.
3- There cannot be repeated numbers in the same column.
4- There cannot be repeated numbers in the same region.
5- The Game ends when all the numbers are completed.

IN:
The Sudoku Game is presented as a 9x9 table, composed of 3x3 subtables called regions, boxes, or blocks. In total there are 81 cells.
The application has a menu located in the upper right part of the screen, to be able to return to the previous screen or exit the application.
On the first screen we have 4 buttons and a central image.
Difficulty: the difficulty will depend on the color icon located on the first screen, the color will indicate the number of cells that will remain with the numbers visible, green being the easiest and red being the most difficult.
Sound: pressing to activate or deactivate the game sound.
Language: each time you press it changes the language in which the help will be displayed, Es, En, Fr, It, De, Ru, Zh, Pt, Hi, Ja.
Help: question button, it is the help for how the application works, when you press it once, the help appears, which will be hidden when you press it again. Hide the help to be able to see the central image, which is the one that starts the game when you press it.
To start playing click on the central image.
Each time you start, a different board will be generated.
The objective is to fill the empty cells, with a number in each of them, so that each column, row and region contains the numbers 1–9 only once.
To select the number to change, click on it, a red box will appear indicating that that cell is selected.
Once the cell is selected, click on the gray box(+), located below the board, to be able to change the numbers. For each click, one will be added to the currently selected number.
Game rules:
1- you must complete the empty boxes with a single number from 1 to 9.
2- There cannot be repeated numbers in the same row.
3- There cannot be repeated numbers in the same column.
4- There cannot be repeated numbers in the same region.
5- The Game ends when all the numbers are completed.