Rahjongg, not Mahjongg, no?
This game reminded me of something I have called Rahjongg-- not Mahjongg. Which brings me to my first point-- Mahjongg is spelled incorrectly in your game. Not a big deal. Anyway, the graphics are lacking hugely. You can barely read the numbers, and the rest of the icons look gritty anyway. I only played through the first two rounds before getting bored of lack of pattern in tile placement. This could have been much harder than it is, so I was a little disappointed. If it does continue to get trickier as you go through the levels, then excuse this review, but anyway, I was a bit bored.
The sound was fine, to me, though I did turn the music off right away. Since Mahjongg is such a peaceful game, maybe you could have put in a more relaxing noise for when a match is made.
I wasn't sure if I liked your addition of making the tiles move forward in the row every time a match adjacent to them is made. I think this made the game much less challenging. Anyway, overall, it was all right.