Really wish the image quality was higher with this one, it´s pretty terrible and I see this file is only 10 kb large so that explains it, make the most of the 150kb you are allowed and I promise you your score will go up. If you are not sure how, there is a tutorial how to prepare shots for challenges in the learn column up here.
The colors are a little flat, and the picture lacks any real interest. The astronaut could be a little sharper, ane there is pixilation in the sky. The lines of the building are nice, though, as is the reflection in the window.
Meets the challenge topic, but is weak in the technical aspect. The sky is very pixelated, as though this was a very tight crop of a low resolution image. This might be better if taken when the sun is in front of the building, rather than behind.