This is so much better than when you first posted this. Nice improvement!

 Alright alright. I'll add in rain :P 

As they say in Detroit, "Make it rain!"

 I like it, the colours give off a kind of plain feeling (I don't find that a bad thing :)).

 Simplicity can work.

Just not for this image.

The rain is missing.

 Blank or large seemingly empty areas on a piece does not necessarily mean "bad" or "unfinished". Often times a piece can benefit from simplicity.

 I dunno. I made this with the help of someone from here, who told me I could add it here. I don't think the current lack of rain really matters. If I had called it "looking through the window", it wouldn't have taken away from the piece either.

I feel that's a pretty big part of the image since the window is huge...

There is a rule against WIP's

Guess that's up to the admins.

 It's going to be animated into the window later on

I believe the main question would have to be....

Where is the rain..?