Sadly, I've seen worse
Your actual animation was lacking, but the characters weren't bad for hand-drawn. My only question is, if it's just a test, why post it here?
That said, some pointers:
1. You build up too long. You're suffering from the DBZ affliction
2. The beginning of a flash should draw my attention, not make me wonder if it's actually a flash or just a tree
3. You need serious work on your sound effects. SERIOUSLY.
Good luck in the future, man!