Ok, to be brutally honest:
This is more of a teaser-trailer than a sneak peak.
It doesn't introduce a main character or show a clip of the actual movie (or does it?) It sort of looks like the opening credits, but I'm not sure.
I love the voice actor of the beginning.
The audio for the newscaster looks about 5 frames out of sync - ahead of the audio. Sounds a bit distorted and as if it's through a TV. I'd leave that effect for the beginning (which I think works great) but when you see the newscaster in person, I would mix it as if you're hearing him in person and not via a TV speaker.
I'm a little disappointed in the lack of ambiences - the only thing I heard other than the music were happy birds. Use crows or a lonely wind.
Now, first sound design lesson of an appocalyptic/deserted world movie: Never put happy ambiences in.
If the world is deserted and all hell is breaking lose, the birds don't sing as if they are in a Folger's commercial.
Finally, the music is quite good but after about the 8th bar of it I got tired of it. Try to spice it up if it isn't a loop or if you have access to the original tracks.
But, other than that, I thought the cinematography was great. You really feel a sense of urgency with the acting - I especially like the people leaving in their cars.
I wish there was more attention placed on sound, however. Some good realism you could have gotten from the car driving through the streets, etc.
Those are my 2 cents. Take them or leave them - I don't mind.