You have much to learn, but it's a start.
You definitely have a very long way to go, but here are some really brief pointers:
- Too fast. Don't be lazy, put in those in-betweens or the motions will be to fast to see.
- Wobbly Animation. Good to see you're doing fbf, unlike most retards, but make sure you take a little more time and redraw your stick exactly where you want it. To practice this, just draw 10 frames of a stick in the exact same position. Play it back, if he's vibrating, it means you need more practice. I REALLY hope you know about the onion skin tool.
- Crappy dialogue. "There's no way you can win, i just used Grand Viper on you." Please. That sounded so bad, oh my god. It'd be better if you just left it out.
- Timing. Sometimes the 'dramatic' pauses lasted a bit too long. Felt like you were trying to kill the rest of the song. At points it even felt like my flash crashed, haha
- Easing. This is why it wasn't smooth or realistic.
- Physics. Your physics were horrible, keep gravity in mind.
Check out the forums, join the Stick Showdown Collab IV. Not does that give you a chance to make a name for yourself (people loved the other three), but we can help you reach a brand new level of stick animation.
Hope you continue, and have better luck with your animations in the future!
-Cheers, Zedd56