From GameBrew - a wiki dedicated to Video Game Homebrew.
SudokuDS is a simple Sudoku game with medium difficulty. It is the first Nintendo DS and C project by Mad.
Fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9.
It is able to check whether any mistakes are made by pressing Start.
Touch screen - movement, put the number you want
A - remove a number
Start - shows the errors and restart the game