Incoming Constructive Criticism-
I understand this is a WIP, but here's my take on it.
1. Use larger bricks instead of smaller ones.
It looks nicer, and it doesn't take up the brick count.
For example the walls are made out of 1x4x5, when you could use a 1x12x5 or if you get all of demians bricks(demians brick packs, 1 2 and 3 on RTB) 1x32x5, etc.
Basically, use one brick for 2.
2. add some elevation variation for ceilings.
The roof to the stage looks too flat, try to add some design and decor to the roof and the surrounding area.
It may take a while, but in the end, it would be worth it.
3. Try not to stick with one shade of color
It looks like you are using the default colorset, which has 1 shade of brown to it.
Try downloading truneo's colorset on RTB to add more variation to it, so it won't look so bland.
Can't really say much else except that you should go around in the gallery and just look around at other people's builds, see how they work their stuff out, etc.
It's a good way to improve, so when you build, you know how it's going to go down.