Great puzzles but interface is a little clunky

I like most of all the graduated levels of puzzles. This sudoku app is interesting because it is challenging, very little help, no undo or redo that some of the others have. What would be helpful would be separate pencil and number pads, and not covering the game board with the number pad(s) when playing, like some of the other apps.

Bob0928498 about Sudoku Puzzle Packs