There is a play store ad that covers some keys and prevents play.
I loved this application when i had it on my old phone. I downloaded it on my new phone. I'm sick of the popup ads it downloaded with it. I'm uninstalling it and looking for an alternative.
Sudoku Great works!
Lots of fun!!!!
Sudoko Hard but loved every minute gets the brain box stimulated as getting rusty in old age I am 70 years old
2.Improve achievements system, and adjust game performance.