I love this! I have a few suggestions... first is that the redead while inside or under something should have an outline that is different from both zombie and human... the ability to click on and follow one or select a group and follow several people maybe the option of bringing in some militant units ... just a few ideas
I love this Game!! now more levels.... maybe a few up grades ... Oh Bonus levels and maybe a level editor .... but even with out all that its still awsome
 "Zombie Outbreak Simulator"){kind=icon}
 "Demolition City"){kind=icon}