- Drag out another "Bulding Block 2x2x1" from the Library, and place it next to the existing one, but move it downward into the ground halfway so that it effectively functions like a step. You'll use this to jump up to the roof of the initial "Bulding Block 2x2x1".
- Then, search for "walkway" in the Library. Drag out "ModularWalkways" into your Viewport, and place it to make a bridge connecting the roofs of the first two buildings.
- At this point, your world should look something like the screenshot. Now, we have a path that follows a step up from the ground and onto the roof of the small building, with a bridge that leads to the roof of the big building. Take the time nudge the pieces around so everything looks connected to each other in a believeable way.