Well,
I've seen better animations, but I still kind off liked it. It was very short though, maybe you can cram in a little bit more storyline progress in the next episode.
Goku was looking very crosseyed by the way. Maybe you can fix that. ^^
I liked that you used the original music, but it might be a good idea to put in a copyright. We all know that you didn't invent all the characters, but some people just like to give you a hard time.
It might be a good idea to put in a preloader and a play button. There are tons of tutorials out there to help you with that.
Hm, work more on character design, etc. I'm still looking forward to the next. DBZ freaks unite!