Your city's layout was fine. I really liked your colored squares in the water and your "palais des congress." Yes, a story would be nice, but that is really optional. My biggest problem was the placement of palm trees- how is it warm enough for palm trees when it is cold enough for snow to stick one hundred feet up in the air?
Needs a story, especially with those mysterious colored squares in the water. The roads dead ending in the water like that might look better with a small park at the ends, maybe a promenade. Just a suggestion.