Needs some work

I like the three-D aspect of this game. But if I walk away from it and my iPad goes to sleep, I lose everything and have to start a new game. Would also like some notification that I made a wrong move. Also, the pencil marks need to go away when a number is entered in a corresponding row/column. A handy undo button would be nice.

Zibbiedawn about Sudoku 3D - Ultimate Sudoku!