Shows Promise
None too shabby, not at all. I mean, the city looked good, the cars moving in the street looked good, even the shadow being slowly cast over the entire city looked good. Even the audio turned out okay, though I would have gotten like a slow rumbling sound for the shadow as it moved (I don't know where you'd find something like that though).
If I had to change one thing though, it would be to lose the stick figures. I know its not easy to draw an all out character and get them to move but NG is very picky about what they let come through judgement. So sooner or later you've got to leave the stick people behind.
Good work though, like the title says it shows promise.