Your art was nice, the plot device used was good and tradional and your voices were great.
It sounds like you need to get better audio gear, though - it brings your animation quality down noticably.
It's a shame I didn't enjoy your jokes and final punchlines - THey just seem overused or help bring the tone down.
On the upside the intro of the animation actually got me excited for something wonderful.
Audio and script. That's what you need to work on.
The audio sounds quite a bit better in the original MPEG version. Still not wonderful, but I have the best affordable microphone available, the Blue Snowball Mic. Writing three minute cartoons is new to me, so I haven't gotten the short writing style down yet. I'm used to doing 10 minute vulgar jokes instead of tame ones. I agree the writing isn't anything special.
There is something about SWF files that make cartoons less enjoyable for me (audio and visual lagging). That is why I wish I got more views on YouTube.