What did you do to the sun? It's all shadow now
Here's what i think about the map: main area, just outside the base, is nice i like it a lot. Maybe make plant pot there? I like the outdoor area too, but the wooden bunker thingy is not good, and kills the mood.
Areas that i dont really like are mid high and low. They're just, repulsive. All of the bunker/cover thingies are horrible, they don't fit in the map and i don't like them at all. Base lighting is too yellow, imo. I would change it a bit.
Just keep up the good work like with the main area, don't come lazy, use your creativity. You can make the map alot better with this. I can't comment on the current state of gameplay, i'd need to play it first.