Hi, I always lurked (maybe did some posts 2 or more years ago) but this thread catched my attention.
I'm italian and i've been in Venice many times. And that doesn't look like Venice to me...
I don't know if you wanted to make it "cartoonish" or what, but something isn't really right in your architecture.
I uploaded some photos
i did 2 years ago when i was in Venice, i hope you can have some help from them.
Actually the water that flows through the canals in Venice isn't from the Ocean (Italy is within the Mediterranean Sea) but it's the water of a lagoon, neither the sea nor a river.