Sorry for being annoying, but there are still some little things that I wanna suggest:
-Add more types of walls (with different sizes and different formats of doors and windows).
-Add a lower ground base.
-Add more stair directions.
-Add ramps.
-I love the building system, but there are some parts that don't fit (1-3). Please fix.
Bonus: (This is a bug) When I aim down I can shoot myself (4-5).