Think you should change your thumbnail. Well, everyone's doing that nowadays. I just loved this because of how twisted it was. The best bit was probably how casual he was. I love what you did with their mouths. At first, it didn't even seem like they had them.
It was more like a piece of flesh was dangling from their bodies. It's just a very effective cartoon. I assume the Firth here is David Firth. This does seem like something he would make. The animation is pretty similar.