Good Work
That would have been hard to make I can tell.
But you should have included a "you win" message one we've solved it.
I hadn't really played much sudoku before, I actually figured out a good technique; Start in the center square and complete it, the do the one just above, then the one on the right of the center box, then the one on the left, then the bottom so that you have completed a "cross." After that it gets easy as. I did mine in about 6 minutes on my second go.