The shading looked strange after I scanned it in, but w/e. I was mostly messing with perspective, I messed up a few ellipticals pretty badly, but most of them follow the correct reference points.
Don't get me wrong, it looks great. But in my opinion it looks even cooler when inverte... just kidding. Anyway, this drawing is impressive. I really like the shading in this. You did a great job of making the terraces look cricular, which only makes it more interesting. It does seem like you have a little too much space on the top, though. Good work.
Thanks, the main intention was to really work on depth, though an actual background may have helped with that. But I don't think this one looks very good inverted.