|Greetings from the Critique Club!
I like the setting! It's colorful and dramatic. Someone has said before that one way to make an interesting photo is to find a great background and wait for something to happen in front of it...this is one of those backgrounds.
However, I have to agree with 2/3rds of your commentators that the couple gets lost in the image. It's hard to see their reaction or relationship to the setting. They appear barefoot and I strain to determine that. Their faces are turned toward the graffitied wall...so I can't really get what they might be thinking about it.
I think this might do better in a larger format. But, for a DPC challenge entry, it's got to suffer for its size. Maximize the size available by using all 640 pixels width (you've got only 620 here). Limit the size of your border to maybe 3-5 pixels max so that there's more room for the image but still some definition from the gray background...and only when you really need a frame to contain your image. Crop as much as you can to make sure the subject is most prominent, too. But, in the end, you need to know that panoramic-type images just don't show off well within the constraints of the challenges at DPC. I think, too, that this could benefit from some sharpening before you save for web...it would heighten contrast and really bring out those transitions at the boundaries of black.
Looking at some of your other entries, you have a great eye for photography. This just isn't your strongest entry. Keep shooting! Keep entering! ...and good luck!