Simply Sudoku is a single-player puzzle game in which players solve Sudoku puzzles by filling a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 grids contain all of the digits from 1 to 9. In this game, players can enjoy quick and accessible Sudoku gameplay on the Nintendo DSi, making it suitable for casual gaming sessions and quick puzzles. It stands out with its straightforward interface and focus on providing a relaxing, yet challenging Sudoku experience, emphasizing ease of play and quick puzzle solving without complex mechanics or additional features.