Nice setup, but the image seems quite pixilated. Check your camera settings and make sure you are capturing at the highest resolution and if so make sure you are following the correct steps to resize your image for the web. There is a tutorial for it in the tutorials section of the site. Good luck.
Concept: Common. Lighting: Really bad. Subjects lost to shadows appear out of place.
Image Quality: Oversharpened or granular - lots of JPEG compression artifacts.
Execution: Decent, looks like some thought and work went into it and not too contrived a pose.
Nice idea, but the lighting could use a little work, and also it the quality of the image looks like it was compressed to much when you saved it for the web.