[Game] Unique Brain Teaser Puzzle Game : Cross Numbers

[codemasterblackperl]

Hi

I have created a game. Its blend of Sudoku, Math and Crossword. It has more than 1000 puzzles.
This is my first time creating a game.
Any suggestion for improvements and opinions are more welcome.

http://windowsphone.com/s?appid=6ec92c27-edf0-4322-a946-5935cc8cfd4b

https://www.microsoft.com/store/apps/9nblggh5fqb5

 

[codemasterblackperl]

So what do you think? Any ideas for improvements?