Whatever you do, DON'T screw up now!
Well, this wasn't what I expected. I expected some kind of shenannigans out of Dumpy when I first saw him, with the spoon on the table, I thought he was a skin-popper, then sanity went south at the playground scene... I recognize he fact that you didn't need spoken dialogue to get the point of your movie across. The art was original and done by hand, which is nice to see, with the Dumpy charachter well developed.
As for the subject matter, it's a very tricky tightrope to walk. I think you should make a sequel to this. If Dumpy gets caught, and the sequel is done well, you'll become a Portal Ghod within a short space of time. Further, in my area, there has been a rise in abductions of kids in recent weeks. Although this subject may piss some people off, it's important to recognize this theme. I certainly hope it inspires parents, or even brothers or sisters who come to the portal (despite their ages) to maybe speak to their kids/siblings about this stuff and help to keep them safe. This subject lives in the basements of our minds, and perhaps this will bring it up enough to help us protect our kids... All in all, good job.