Very average.
Although pretty addictive, like your last game, this wasn't all that crash hot in my opinion. It was pretty fun to play after about 3 games, as once again strategy came into it once you fully understood the controls.
The graphics were dull and simplistic - couldn't you atleast have coloured in the paddles and ball!? - there was no audio and it got boring after a couple of minutes.
However, I did enjoy playing this game for a short while, and I managed to ruffle up a score of 46 by the end of it. At the beginning I felt that if I just kept the ball moving at an even pace which I could easily control for the entire 30 seconds, I'd get a good score - the 'out' feature was very good - and this proved to be a formidable strategy untill I got the hang of handling the X and Y axis in unison.
If you want to get into detail, the only thing you need to do in this game is move the mouse in a circular motion that agrees with the direction of the ball. This way, as you are aiming the paddle that the ball is coming to, you can prepare the paddle on the other axis for the next shot, and so it goes around in a circle. I'm sure you're aware of this, but I just thought it was nice to know that the motion could be tamed through a simple technique.
This did, however, jeopardize the gameplay of the game, as it then only became a matter of circling the mouse again and again when playing.
As I said, the graphics were dull, and after a few rounds, the game becomes so, too. Pretty good actionscripting, but no match for your first game :P