Upload & Sell: On
First, thanks for the compliment!
Second, competition tends to be high with many strong images in the WA's and MA's.
Third, I think your subject is quite good. But needs more aggressive processing for the grunge look.
Not sure what program you use.
Here I used LR, then Nik Color Efex. But most of the effect was in LR.
In LR, used alot of highlight and shadow recovery, pushed clarity to the max for an overly detailed, textured, grunge look, applied some curves, reduced saturation, rough perspective correction. Sharpened your small jpeg with high detail, low radius, low strength.
In Color Efex I further boosted mid and highlight contrast for more detail, masked the effect over the foreground floor where it got just too crunchy/busy, reduced saturation a bit more.