Awesome. I have one suggestion. On the roof of the main building where the checkerboard pattern is, you can use the clipping tool to get the edges of shapes to line up perfectly (that's how I did the shadow for the blue-green vine in the top-right corner of this [link] ). It will save you a massive amount of time and increase the accuracy of your images. Tutorial here if you don't know how. [link]
Glad you like how it came out, it has been sitting in my to-do folder for a while and I finally felt like trying it. I was kind of shocked that no one had done it
Credited.