To change your password:

Near the top - right corner,of the page, click on your name (left of the 'sign out' link.)

In the drop down menu, which will appear, select 'Update Details'.

On the page that appears, 'Update User Details', you can make the change.

Download Sudoku from google play store
https://play.google.com/store/apps/details?id=com.Labogames.Sudoku

Too important to be left in the doldrums...