This is really good.
The overall colours used are excellent and compliment it well, it's proportioned pretty well and I see there's a lot of fine touches and details. The only criticism is if there is too much detail in the debris, such as the 1x1 and 1x2 plates on the floors. I'm afraid that if you do that you may rise the brickcount unnecessarily high.
Overall, really good.
9/10