It needs a bit of work. Remember, I'm only doing this to make sure it turns out better.

Remember, I'm very harsh, but here it goes:
The metal window texture isn't bad. May need a little touching up. Looks a little bit like its not a tileable texture.

The window widgets need work. Wait, they totally need to be redone. They look kind of like they were taken directly from a photo. Maybe a layer styles attempt would yield something pretty cool.

Maybe the tittlebar could be a little less flat.
And don't try to recolor anything.

There's alot of potential there. What if you went for a different angle? What if you tried to replicate a brownish/yellow stone in photoshop without it making look like it was taken from a picture. I have this idea in my head for something, but I can't describe it.

I'll try to whip something up in the next day or so.

But keep working on it. There is alot of potential for another great textured theme.