I like the build man.
Concerning the walkway, less is more. Right now it's a bit cluttered for no reason. Many special bricks makes it feel ornamented in a way.
When you're finishing that interior, consider having a look at the ceiling and walls. Those are crucial for an attractive interior. Ceilings can have different kind of supports and beams or ventilation. The walls can have support/beams too, and pipes and/or ventilation which makes the build pop. It's often a work with layers.
As you can see you don't need much to make stuff happen.
And here's a different take on an interior wall