I like the idea, and it looks like a good start. As the others have said, the buildings in the back need improvement. Overall I noticed a lack of a clear path, as indicated by how many signs you had to point the way. The carpet helps, but it still seems like it would be hard to follow. I think a simpler path would benefit this map greatly. I would really like to see some improvements, but until they are made I will have to decline this map.
As a side note, rather than the "map credits" at the end, I think it would look cooler if you had armor stands posing as workers around the worksite with the heads being those of the builders.