Can you remember if the building had some lights on and off, and whether the street light was on with a nice glow on the street below?
i spent a good day or so just painting the ground under the light to get it looking just right.
in the sewers i had gaps in the platforms. think of the first level of Sleepwalker when you go in the sewers. i had it so that if you messed up a jump, you drowned.
I dont think I put anything on the streets. maybe a sign. Oh! there was a T junction if i remember correctly, to the right of the multi storey building... it sort of went into the back of the screen.