It's pretty good. The fighting animation looks nice; not exactly godlike or anything, but better than anything I could ever even hope to do. However, when the characters aren't fighting (standing and making idle animations, ect.) they look a little off. Another thing I'm not crazy about is a few of the backgrounds and scenery. The birds-eye view of the arena thing from the beginning is what caught my eye; it's sort of hard to tell what it is.
The story seems relatively solid, but the one thing you really need is voice acting! You don't have to be a ventriloquist to sound like Dragonball Z characters. I bet you could do it or find someone to help you out easily. I gave you a 3.5 out of 10, rounded up to a 4 in the vote. Just do some touch-ups on the animation and get some voice acting, and I can see you getting perfect scores.