I really enjoyed it!
I rated it a 5 and left a comment :) One of the best 'first' stories I've read on this site in awhile. As I said in my comment on the game, I'd love to see what happens next in the story.
One thing I would suggest is maybe trying to allow the player to use items rather than just carry them. It makes them have to pay closer attention and think more on the situation "Should I use the bat here or the flashlight?". I liked that there were multiple endings in the game. One thing I did notice was that, despite having a baseball bat, I could never actually fight the zombies and win(Unless I missed a page somewhere XD). If there is a path in the game where you can be a zombie hunter type I'd love a hunt on how to get to it. :D
On another note. I really enjoyed your writing. It has good grammar, you put time into each paragraph, and it is obvious that you had fleshed out the plot for the most part. Can't wait to see your next piece! :D