I have a lot of work to do... the 'boss' zombies are going to be pretty cool. I plan on making some large bad guys that you can beat using your wits rather than firepower. Throwing stuff at zombies will only slow them down. I might have a go at the first boss just so I can throw it in the demo at some point. I'm already working on a few extra zombie skins.
I'll reload the video later to put a higher quality version up and another one of the level editor in action. That "scream" the zombies make is a bug although an occasional scary noise like that might add to the ambience, I may have to create some more noises...
I have another gameplay idea that if you can get to a "purge" button you can kill everything in the room. I might try to get that into the mix as well as moving platforms, key-cards, push-able/destroyable crates and a few other ideas. Don't want the first couple of areas to get too complicated but I think I still need to add a few more things for the demo for it to feel complete.
EDIT: Here's the original at much higher quality:
...and here's the level editor in action:
Zombie boss preview (Not happy with it yet but the animation is spot on):