So, since the first screenshots appeared on the page, I have redone some maps and here they are:
The Floor 0 level looks different. Now there is no windows in the darkness, and now, you can't skip the lobby part, because now the door is blocked by metal part, and you need to walk through lobby to get out.
The cliffs were flipped, and also I'm planning to make a small train station there
And Salaryevo map was flipped too
The canals map is flipped now. This is all I can say about it.
And lastly, the skybox on intro map has changed, because everything is happening while it is polar night.
