i'm sorry.. maybe i'm being a little harsh on the criticism, but i just don't get the premise for your webcomic.
even something as poorly drawn as
http://www.qwantz.com has a premise.
two characters who are caught in the same comic frames, yet are able to have meaningful and thought-provoking dialogue. they're also dinosaurs!
also, if you plan on making a webcomic about zombies, give
http://www.elsiehooper.com a read. its dark, its brooding, it has zombies, guns and violence. its one of my favs :P