Ooh, wow! Looks good!
One thing I might suggest, if you don't mind, is add either some size/shape variance, or color variance when it comes to the window. (I think it's a window, at least?) It's perfect-ness is a bit distracting in my opinion. However, it is, nonetheless, a really nifty picture, and I'm excited to see what's in store! ^^
I'm pretty sure I've been a silent stalker until now. Oops.