Good sound quality. Nice voice acting. Good use of ambiance and sound fx. Interesting camera angle at 42 sec and appropriate since it's from the character's pov. Story went a little too fast though. I couldn't figure out why the character in the overalls flipped his attitude so quickly and decided to join the protagonist at the end with no explanation.

Artwork could obviously improve but I get that animating is tricky. If you have have the capability try playing around with different brushes to add some texture - especially with the background and you'll see a huge difference. Also you could use different mouth shapes for phonetic sounds: I find this diagram to be extremely helpful and simple http://orig06.deviantart.net/a793/f/2009/079/f/7/phoneme_mouth_chart_by_cartoonistwill.png

Additionally if you add eyebrows to your characters it will make it far easier to articulate their expressions.