Shows promise, but....
To be honest, I really enjoy games in this style. However, this one didn't strike me as being very spooky. I practically walked through it in less than a minute, there were no zombies, no gags set to spook the player, and basically no action gameplay to speak of. Also, the progression was a little too obvious.
However, it shows real promise in becoming a spooky zombie game. Search around for a shooting game tutorial on Newgrounds. Then, get your MacGuyver on by making some item and area puzzles. An overview map for maneuvering around the areas could help, too.