I did a quick Paint over.
I worked on the perspective of the scene a bit. Guessing its a 1 point perspective scene. You can correct me if I'm wrong. I changed the contrast of things as well as defined the buildings in the foreground. Things wouldn't be this dark because you still have the light from the sky as well as light coming from the windows and cars that will be below.. You'll get a lot of bounce light in different areas. I didn't push it super far but it's something to think about. Just look at photo reference of New York, Tokyo or Hong Kong at night. Those are great reference.
Also, you can define the character a little more. This is a good start to the scene. I really like how you did the water. Guessing you used some kind of custom brush to get the effect of waves. Keep up the good work. I'm not Marc but I hope this helps a bit.