Hola stef1, I'm delighted you like the image and I apologize for again taking so long to reply. You're right, creating the illusion of depth and space can be difficult, but keep practicing and you'll get the hang of it. There are a lot of good books on the subject. One of my favorites is "Keys to Drawing," by Bert Dodson, which deals with perspective and other problems we all encounter in making art. It might be a good addition to your library. In relation to your question, no, I didn't add any more colors to the left of the drawing because at the time I was interested mostly about the structure of the buildings. Here's a photo of the final painting, however, in which I unified all of the elements of the street corner and also changed the figures.