where does the light source come from?
one side's of the house's brick tells me the light source is placed in a different place than the other side of the house is telling me it is.
you should remove the outlines-
and i didnt know glass was light blue lol. it should be reflecting some trees and whatnot, and if it comes to reflect the sky, it should show a less saturated color ;]
u have lots of work to do on this piece