It's always cool to see where good musicians came from originally. Funny enough, I'd say you were a lot better at piano back then than I am now ;P
As far as first compositions go, it's definitely one of the better ones I've heard. The melody's okay and the chords you picked fit nicely, but as I'm sure you know, it doesn't really go anywhere once it's started. The song kind of stays in the same position all the way through, though I do appreciate the playing around in the upper octaves as well as the left hand doing more than just blocking out chords the whole time. The mistakes early in the piece are noticeable enough to pull you out of it, but they don't continue throughout the entirety of the music. It's pretty enough, for sure. It's just not something I could imagine remembering into next week.
You already know all of that, however, so this review is kind of pointless. I just wanted to point out how much progress you've made from this point. :D