It was decent, but it had its flaws. First off, the animation was particularly good, aside from some shots that seemed a little too slow. The cinematography was iffy; I liked some of the camera angles you chose, but there was distracting light flicker and a few camera bumps as well. However, my main issue was the voice acting; the middle school voice doesn't fit with the zombie atmosphere of the film (Maybe you should consider getting some voice actors who are a bit older?). Other than that, the sounds were good. Another thing that bothered me were the titles, which were uninteresting, unnecessarily long, and a bit out of place. You should take a look at some trailers on YouTube and see how the title placement is in their films.

Overall, I just think you need some more practice with your films.