having a mouse only Sudoku game doesn't cut it. You have to allow the ability to input numbers directly via keypad. that would speed the game up a lot. get a different music track, smething that doesn;t make you want to gouge your ears out after 2 plays. kudos for putting the sound on/off switch in, THANK YOU. add a little color, black/white is odd. spice it up a little. other than that, solid Sudoku game.

Fairly good, though I have a few issues.
-There are not enough levels. While the puzzles are mostly good and enjoyable (though not very difficult even at Hard) they suffer from a total lack of variety. I attempted a few puzzles multiple times to see if they would change, and it appears that the same puzzles were being used. Perhaps a Sudoku randomizer would be a good idea to generate random sudoku puzzles. Three or so puzzles at each difficulty is not hardly enough. I think it would be better to have an almost infinite number of puzzles to solve. That would be good.
-The music was a short loop and was very repetitive. It got boring and grating very quickly, you might consider picking a more ambient track maybe? Music that is not distracting perhaps?
-The use of mouse. While I really don't have that huge a problem with this. The game would benefit from allowing the use of the keyboard to input numbers. It would make it more convenient, and would make inputting values a quicker process resulting in better high scores.
This game is not really so bad at all, it could be better though.

Seems like a OK Sudoku game.

sudoku:it's fun and basic!
-the first thing you have to do is add MORE COLOR!
-i don't like the num.pad on the top right,how about using the keyboard?
(-add more levels)

Mouse only? Need keyboard, especially number pad access! Very slow, annoying music you can't turn off! And ads!