I have a question for the level it's BSP without shaders ?right ?
Some things that could make things harder : make some zombie splitter like in Left For Dead 2 !
Or some amoured zombie or special ones,that regenerates and taking damage only behind in a weak point : this could force player to use some strategie !
Great that you've finished a complete level, next step, new original levels and zombies, weapons perhaps also
?
Any chance for a demo ?
Great game ; i like it, keep it up