Game Play :

Generate Sudoku And Play.
Select the difficulty level by select numbers from 41 to 81 by scrolling spinner and Generate New Sodoku and Play.
There are various option buttons for assisting you in solving Sudoku.
On Cicking Check valid button, you can check whether the Sudoku is Valid or not at any time.
On Clicking Solve Button, you can solve simple level Sudoku.
On Clicking Guess Button, You can solve middle level Sudoku.
On Clicking GuessNext Button. You can solve high level Sudoku.
There is also Back and Reset Button for traversing back while solving Sudoku.
At last, there is a textbox for setting difficulty level of your choice.