COMPOSITION
You have filled the frame with the subject nicely. Also, I like the diagonal movement provided -- it is much more effective than a simple horizontal or vertical framing. Maybe just a touch more space at the top, or a tighter crop at the bottom would give it a more balanced feeling.
TECHNIQUE
Great focus and colors. I like that the cracks are so visible. Also the colored shadow is a great touch. I think that if there was even more of that, it would particularly effective.
OVERALL EFFECT
This is a great abstract. It is "out there" enough to gain the viewers interest and keep it, but not so wild that it totally confounds. The colors are very warm and inviting. I think this would look good on the wall of a modern apartment or townhouse, etc.