This is worthy.
I think that you've done a wonderful job here. The images went very well with the music. It's very minimalistic, but you got everything important across. And it undoubtedly sped up the process... who knows if you would've ever finished it if you had started with a too-complex graphical style.
And yet, I'll still say that you could work on developing your drawing style. Don't go in the direction of making it overly complex and formal, though! I love the simplicity of it here, because it really allows the emotions in your hand to shine through without getting drowned out by too much unneeded detail. But there is always room for improvement - just keep going further in that direction. Learn and understand the world, and your drawing will improve.
Thanks for explaining your intentions to an earlier reviewer, by the way. I got many emotions from this film and a few of the themes, but I didn't really understand it as a whole at first.