good - but a few suggestions
1 - change the name of the title... there was a zombie movie called "Brain Dead" already... it was directed by Peter JAckson. It's now called "Dead Alive".
2 - you should've broke it into a few parts and came up with some more story line and dialog... it looked pretty good for the killing scene set-up... but it was too MTV fast. No horror... just... snap snap snap - done. Was kind of boring that way. Maybe if you streched out the scenes.
3 - perhaps a better explination... or more thought to the reason why things are happening. Just looked like an excuse to quickly draw some friends killing each other.
It was good - don't get me wrong (although I hate anime drawings like that)