Nice
Great job for your first flash =D
Here's just a few pointers to help you improve:
1 - I noticed that when the video ends, it goes back to the beginning and the music starts playing again over the last one, you may wanna fix that glitch.
2 - Try to be original and creative with your font choice, I noticed you use Time New Roman, a default font, just changing that font will make a big difference in presentation.
3 - Spend a bit more times on your drawings, I don't know if you were going for a dirty kind of feel, but everything looked a bit haphazard.
4 - For the punch noises maybe using a different one each time would be more interesting rather than repeating it over and over.
5 - On the title screen, the message you put was kinda plastered all over the place, it's ok if you make the font smaller and just keep everything on one centered line, neat and tidy.
Anyways it was actually entertaining, I laughed at how simple it was :D
Great job for your first flash
5/5
8/10
-M