Very beautiful, and very stylistic. It quite a few watch throughs to find where the mechanics and time savers start to show through. It was a very unique concept, time being like a story book, written a page a day, unable to "skip ahead". However, I don't think that same idea, which you had written about in the author comments, was conveyed clearly to the audience. Most people understood that he tried to travel in time to help his spouse, but weren't really sure whether he traveled forward or backward until the end (or at least, that's how I thought the first time I saw the video). And I wouldn't have caught the idea of Time being like a book in progress, unless I had read all the way through your commentary.
All that said, don't think that I think you did a bad job. It was a wonderful story, and very touching, something I'd really like to see more of on newgrounds.