Great Work!
In my experience, there's no such thing as being entirely satisfied with a song. That said, there's nothing at all wrong with this. It's emotive. It's moody. It's melodic. It's well produced. It's bittersweet. I don't know the original song -- I was never big on Zelda -- but I'm guessing you more than did it justice. You did well. Now do more. : )