Good use of the window opening as a frame. I also like the fact that detail is still visible in the bricks surrounding the opening. If your editing software will do it, I'd try raising the color saturation a bit and see if you like that better. I'd also consider cropping both sides. Especially on the right, I don't think that large expanse of dark bricks is doing much for the image. Keep just a full brick's length on either side, and see how you like it.
