It is texture and the technicals aren't bad but it's kind of boring honestly. I don't mean that in a bad way just that it doesn't hold my interest which might be the reason you don't have a higher score. Maybe if there was something to rest the eye on like a flower or the end of a burnt stick or.... well something.
An interesting choice for meeting the subject challenge - very abstract and different. The image could be a little more dramatic. A little more focus would have helped this image score higher. A good, solid entry into the challenge.