Nice, but needs work
You've got great talent, and the animation was nice. But there are a few minor problems with this one.
Firstly, you need MORE animation, you just had this guy bopping up and down while talking. You need other stuff besides him.
Secondly, the peoples mouths are the most obvious. You need to time the audio and make it look like he's acctually saying it. Its not hard.
Thirdly, The sound levels, you must make the sound levels around the same level or people (like me) will turn their speakers up to hear the voices and then be blasted out by the massive sounds of the sound effects you had in there. Its just too hard to watch then.
Other than that, nice idea and good drawings :)