You have created a good diorama Martin, with an obvious story line, and good balance of content. No undue open spaces, they eye is drawn around the diorama looking for small details.
There are a few points to keep in mind for your next one though.
The house, needs more work to bring out the texture of the brickwall. A wash of a very diluted 'dirty white' to bring out the pointing (voegwerk) between the bricks is a must, and so is the use of different shades of red, brown, maybe brownish yellow, on individual bricks. You have done a nice job on the interior, but the rubble needs to be more like rubble. Make a mix of plaster, coloured in a brick colour. Smash it up with a hammer. (No, really..) Mix that with PVA glue (houtlijm) and add to the diorama. Look
here for an example. Yes, that's another MiniArt building..

they arre very nice..
Looking forward to see your next diorama Martin,
Cheers
Henk