A color palette for the game:

And some preliminary scale testing for the level
I started with 32,768 x 32,768 but when I scaled in the map to size. I know a 256×256 box is supposed to be 16′. So I dropped one at the address 1 KnickerBocker Avenue. I placed one on a building I know is about 25′ wide and they were about the same size. So clearly, I can see it needs to be scaled further probably another 50% to get to approximate real world scale. I will try with 49,152 for the whole level dimensions

Scale test1: