Opensudoku is an open-source Android sudoku application, Materially designed.
here I suggest that added features pause and share via facebook. to make it easier and safer for users to use this app.
The benefits of facebook sharing feature is to facilitate users in sharing the results of his game to social media facebook and the benefits of this pause feature is to allow users to quit the game for a while and can go anytime without having to get out of this application especially.