Excellent interpretation of the theme. Hilarious and original. The introductory text is legendary. I also like the theme of arbiter, bringer of order and balance.
The graphics were nice and functional apart from the character sprites. You definitely need an artist!
I wouldn't say this game is suitable for casual gamers without some tweaks because the difficulty scales up too quickly. I went into the zombie base to make political statements and suddenly there were two boss zombies breaking down the fence of the other side. A more gentle ramping up of difficulty would be nice.
Great game concept, and viable as a marketable game in my opinion!