Beautiful! Yeah, it's short. A bit too short, actually. I was hoping to hear more of that really pretty piano with atmospheric sound. Is the opening sequence of the visual novel this short?
I think you should do a more "full version" of this, just for the fun of it. That's what I would do, just to feel really satisfied with a sense of accomplishment.
I know what you mean by perfectionism! I am like that with most of any creativity I do, most especially when it's a huge project. It's both good and bad (though for the most part, good). :)