That cream tone you used on the walls should be renamed "daporta beige" hehe its quite a signature.
I agree with Barry on the pyramid, and here's my suggestion: as I did in the Colonial block's roof, I suggest you leave only the vertical line. This way, the pyramid will be slightly higher and with proped lighting and shading could look more geometrically accurate. And about the umbrellas, I agree with jalonso, and I also suggest you use a light blue tone on the inside lines of it, to give that high relief (?) feel.
I like how I can always tell a project is yours just by looking at it, it's something I don't believe my projects have :-