Hi @emrecan akyolcu your picture looks interesting. I like the colors for sure and it feels like there is some kind of story. I do not understand, what you mean with "I am stuck". What kind of feedback are you looking for? Looking at your picture I thougt there is a figure in the middle of the lower half. Is it batman? And the structure in the upper half left hoovering over the "building" could be a giant head?

Hey Emrecan, I'm not an architect but I thought I would show you what I would do with this image. I would add a foreground, middleground and background element to show some depth. Also, the structure is done with hard edges, that makes it come forward visually. Everything else is handles with soft edges which pushes them back. I would also move my horizon line up instead of having it cut the image in half. I hope this was helpful to you :)