As some of the previous people have mentioned, the image is grainy and a bit blurry but I think the camera is at fault here. I went back and looked through the images taken with an FD-73 and they all look similar to this. So, I guess you can't do much about that.
Some things that could be improved:
1. The lines on the court do not line up with the sides of the photo. It gives a strange visual to me. Kind of like abstracty art. I think eliminating or aligning them would improve the composition.
2. Add a ball. It seems simple but it would make for a much more dynamic image with a ball by the hoop.
I definitely like the idea and I think it has a lot of potential.
You can also try cleaning up the grain using NeatImage (there's a free demo) but your mileage may vary.
I like the idea, and the hoop looks good in the center. The whole image is grainy and out of focus for no reason that I can see. Try focusing first on the subject by pressing the button half way, then move your camera to compose the picture while still holding the button. Viola, your subject will be in focus.