A bit buggy
My biggest problem was the scoring system. Whether or not you did this purposely, whenever someone scored in a corner teo people would get points (the people whose sides met at the corner). That means if some guy other than me scores so he is one up from me, I could score in the corner that count for him and me 14 times and he would win.
And thats not right, I scored all the points.
My second problem is the graphics. Mix it up a little in-game. At least make all the paddles different colors.