@Paddy
I was following the original tiling Konami had, the window is also cut in the original and the exposed bricks are in the relatively same spots as well. I appreciate the criticism anyway, this was my first attempt at tiling so its nice to hear input! 
I think next time I will take more liberties to make things flow a lot better...
I like the overall "messyness" to this piece, if you'll call it that. It doesn't feel super linear and tiled based due to that. Some things however look out of place; for instance those 5 brighter gray sections of the walls look as if they were just cut and paste ontop of the existing wall, they don't flow well with the rest of the wall. Another inconsistency is the middle window, why is it that the right hand side of the window was just cut off?
Regardless, wonderful piece. Love the gui text.
Keep up the good work.
I love this so, so much. Chunky design is best design, as I always say! I wish I could see it as an animated gif or something!