This had been said before.....but ever see "Doug"?
The graphics and animation are both fantastic, its just the script and dialog seemed a bit slow for me, your voice is fine, but does get somewhat.....umm repetitive? as you don't really have one of those voices that can be used for multiple characters. All that aside, it was still humorous, not necessarily funny, but getting laughs from a flash cartoon is difficult obviously.
Graphics/Animation: Very well done, all the backgrounds such as the boat and water, flow PERFECTLY, and the sound syncing was very good, characters are well drawn, but he really does look like Doug. haha
Sound: The scream when he was lit on fire was funny, but for the most part the dialog sounded a bit TOO scripted, if you know what I mean.
Humor: Very humorous but not really funny, still not a problem though.
Overall: Worth a solid 8 or 8.5 an obvious amount of work has been put into this, and I respect that more than anything else. Good job, and good luck on your future projects!