Has potential
Looks like it could be cool, albeit a bit overplayed (How many flesh-eating zombie movies/games are available nowadays?). I suggest adding voices for dialogue besides the screaming and zombie sounds. Also, it was too short and the "cliffhanger" wasn't much of a cliffhanger at all. The swat team coming out of the truck didn't look anymore impressive than anything the zombies have been killing so far (they didn't look like they had better weapons or were any more bad-ass.), which didn't make me eager to see the next installment, because I don't wonder if the swat team is gonna give the zombies a run for their money. Also, you should include a little more information at the end of the Flash besides "The end of episode 1". Throw your name up there, give yourself some credit. Perhaps a word on when you expect to have the next episode completed, or a link to a website, if you've got one. Just a few suggestions.