Well, I haven't played this game for a very long time, but I think there are pros and cons.
I think the engine is pretty neat, once you get used to the timing and positioning required to hit the ball. The graphics are unfancy, which is nice for a change.
There are a few flaws. The difficulty settings, for a start, seem glitchy. The default setting was Novice, which I played against, and found pretty difficult to score points against. Then I changed it to Dumb As A Rock, which meant that the computer player refused to hit the ball back. Then I changed back to Novice, and it was still refusing to return my services. Then I changed to Pro and it was difficult again (the same difficulty as Novice had been when I started up).
I think more control is required over power and accuracy. Contrary to the previous reviewer, I found the mouse control too hard to get to grips with. How about the ability to assign shots of different power to different buttons, on the mouse or keyboard? I think the shot directions need revising too, as I found that sometimes I'd hold left and press space and my player would hit the ball right instead.
It would be really nice to see a multiplayer mode using the left and right half of the keyboard, although how difficult it would be for the developer to incorporate this I don't know.
Keep trying, good luck with future versions.