Positives:
Composition strong. B&W works. Nice easy curves. It's simplicity is a strength.
Technicals:
Lighting and range of black to white is fine. Focus is soft on the brightest areas and the DOF may be misplaced.
The challenge:
Meets the Patterns challenge topic well. The technicals are what holds this image back more than anything else, particularly the choice of focal point, and explains why it has a less than average DPC score.
Suggestions:
To this viewer the choice of focal point for a shallow DOF is it's biggest fault. Normally, I would want the closest object to the camera to be in sharpest focus, but not in this case. Consider a reshoot with the focus centered on the most distant bright areas in sharpest focus and the grey closer circles in softer focus (or sharp themselves). You might like the result better.