This is a wonderful "alien' landscape fractal to me. It looks as though it used to be a thriving city, but now everyone is gone, and only the buildings remain.
I love how the image draws my eyes in both directions to try and see what is just there, off screen. Your use of green gradient with different hues is really good. I also love that almost yellow/green line in the lower left hand side.
The manipulation of the mountain-like buildings in the background bring the whole piece together.