Hi Andre,
This is a very nice abstract, I have tried similar photos myself and appreciate how hard it can be to get a composition that works and to effect suitable lighting. The exposure is spot on and technically the image is excellent.
You received some mixed feedback from the voters and your overall score reflects this. I agree with the comments that with a photo such as this would have been better posted at full-size 640 pixels.
Overall I actually like this a lot although my main criticism would be that the image lacks a focal point. The viewers ete is left wandering around the scene. This has merit as it can give an unsettling feel to a photo but in a challenge such as this with voters spending seconds on each image it doesn't quite work.