It lacked structure.
I don't know if you planned that or not, but it sure looked like you just kinda' threw it together, and thought of it as you went along. If you didn't, plan, then DO it next time. If you DID, then you need to work on your storyboarding. I'm not going to say it was a horrible movie, but I will say that it needed to have some sort of goal. Movies are like sentences. They must be complete, and have a subject... and other stuff... yeah, I'ma' stop right there.