Rails for Zombies One

Here's the brief: The web shop I work for, Envy Labs, has put together an Into to Rails course called "Rails for Zombies". I've been tasked with designing a brand identity for the course. The course is actually an interactive application where users learn the basics of Rails, with, of course, a lot of zombies.

So the initial direction was to create more of an overall style with several different identity elements that could be used in different formats (web, print, shirts, stickers, etc). We could potentially use all of these elements in different ways. But we definitely need to land on one in particular for the logomark.

So in the next several screenshots I've put together several different designs and would love your feedback on which you feel is the strongest, positives, negatives, etc.

So, One...Two...Three...Dribbble Go!