Great, but it'll only cause problems for you.
I hope you read this, I am putting oodles of thought into it (fourteen fucking oodles to be exact). Anyways here is the bad first.
---The Bad is it would appear that you have changed your style to match David Firths. I liked O Tamboril, and I beleive you are one of the better New Authors/Animators on this site, but this is just too much Dave Firth for one person. If its a parody, this would work wonderfully. If its a fanart peice, this would work wonderfully. But sir, it is neither. It is your take on one of his characters, and without this being a fanwork or parody, then you are stealing.
---The Good, because this is more Good than bad, is that you have managed to turn one of his characters who would likely have never been seen again by his animating fingers, was turned into a badass freak I'd like to see more of now. I like how you touched on his house, on his cage, and his oozy ickiness that reveals that his icky boy face isnt actually his face. The skinned dog made me smile and you have a great sense of talent working up on yourself, with many great animations made (and I hope many more great to come), but sir, there is no way people will get over that this is NOT your character ,and to be fair, I couldnt see it as one. My advice, in all honesty, is to say that this animation is a Fanwork paying Homage to Salad Fingers 4, otherwise it will only cause controversy and icky nasty feelings that will turn some of your potential fans away.
But my god, a fucking hand on a meat hook? Thats genious all in its own. I most definately seek a sequel, sir. None the less, accidently ripped off or not, this is a favorite worth seeing again and again.