I enjoy sudoku alot, and yours was well done. The only downside is I like to put numbers in unsequentially sometimes, although I understand the complications in Flash to do it any other way. Good job.
4:01 for me. Nice game, though it does freeze when you hit the Solution button and the music gets pretty annoying after a minute or two. I like the game because it is simple and requires logic, but it's hard to judge because of its simplicity and because I've already played it thousands of times before.
If you kept going with this it could be a good sudoku game. There needs to be a "next sudoku" button, and it's kind of dissapointing that there is only a really easy difficulty... it takes 1 or 2 minutes to beat the thing.
I am one of the many who had/have the sudoku flu, as where once I started it was hard to stop... but then it got a little repetitive and I stopped. This is on the beginners side of the spectrum and there is only one puzzle... what the heck? Only one?? As I said once you start you get on a roll and don't really want to stop but you have no choice seeing as how there is only one puzzle on here.
Add more puzzles. maybe a couple more loops of music and this game will be golden.
The timer is distracting.
In addition to other people's comments, I also found the timer to be very distracting. A hide/show button would be useful.