Well, the piano work is pretty good, it has a nice beat, and is relatively catchy. The first complaint that comes to mind is that it's short, but that's not a big deal, as a result of it just being an intro.
The other main complaint I have about this flash is that it's... rather dull. We get a couple credits, and see the moon floating through the sky. The stars are rather generic, but the moon is nice.
The main problem I have with this flash is a nihilistic sense of "Why does it matter?" Again, I like the music piece, but honestly all it is is 60 seconds of music while watching a relatively-well done moon dance across the night sky. For an intro, it's not bad. For a video, it's just not enough.
Now, what I mentioned might be enough for some people, but in my opinion, videos need to possess a sense of content, and purpose, and this video just didn't for me.