I need help with perspective, depth, lighting and value. Some structures doesn't look like it have space between them like I imagined it, especially the billboard at left corner and the building behind it. They look like they are part of the same structure. Also, please feel free to point out any area where I need to fix for improvement | Artwod Feedback

I need help with perspective, depth, lighting and value. Some structures doesn't look like it have space between them like I imagined it, especially the billboard at left corner and the building behind it. They look like they are part of the same structure. Also, please feel free to point out any area where I need to fix for improvement | Artwod Feedback