Does look cool!
There are just 2 details i would think about chek if it was your intnetion.
- Maybe some big element leaking from the cirle at the bottom left could give some equilibrium for construction/port crane on top right. Something should contrast that
- the circle border is sometimes to present revealing the whole photoshop layer effect, maybe some silhouettes should hide it at top left side
Those are just personal perceptions
I like the overall feeling