This is a nice shot. The idea is great and the angle surprises the veiwer at the first sight: are we looking through this window from inside or outside ...
However, I think that by cropping the line on the left, tilting the shot a little bit ccw, and increasing the contrast, it will somehow catch the eye even more.
Anyway, this is my personal POV. Great work
Califfoto from http://www.califfoto.com