I found this entry particularly interesting, as it is a similar reflection-in-a-building concept as my own entry in this challenge. Looking forward to seeing what you turn out in the future.
very cool shot. I would personally rotate it 90 degrees (when I turn my laptop sideways, I LOVE THIS SHOT- makes the crane look taller instead of longer). Well done.
This could benefit from some levels, curves and saturation adjustments. Just out of curiosity, I copied and pasted this shot into PaintShop Pro and those quick adjustments made a huge difference in this pic. Those adjustments also brought out a lot of compression artifacts around the window frames. Your file size is only 49k. You could have used a lot less compression and that would have helped as well. Compression kills detail. Always use as much of the available file size as you can. (150k for a basic challenge)
Composition is a little odd as well. I can see some effort to try and get an interesting viewpoint, however.