Ehh...
It looked OK, but there were some major problems.
For one, you stopped colouring the dragons after the reached a certain point on the screen? Why did they just go transparent like that?
For two, it looks as though you just drew one dragon doing its little motion and put it all into one Movie Clip symbol. You then just copied and pasted it around... Changing backgrounds and copy/pasting a dragon doesn't make a very impressive Flash movie.