Good n' stuff.
It's good. The drawings were pretty good, and I liked the blur effects you used with things that were far away in the backgrounds. The effect looked cool on close things too when the view moved quickly. The smoke effects were also nicely done, or whatever you call them.
The background, although pretty well done for the most part, seemed a bit dull when there were only solid colors in view. It looked a lot better, for example, on the part where you see the black stickman standing on top of the building. Everything looked great since you made it clear where the sunlight was coming from, and it kind of gives you a feeling of being high up from the ground.
No sounds, but a good song choice.
No violence, humor, or interactivity except for the play button, but those factors aren't always neccessary for a good animation.
It was a nice movie overall; I'll be sure to watch the final version when it comes out. Good luck with that, by the way, and great job on what you've done so far. =)