I like the idea of anti characters may be a antihero in this case and I'd definitely wanted to see a version of this as a snake who tries to live through the humans. Maybe start the game in the lab while eating up some scientist and get longer tail and somehow find a way to escape the lab to the city where it strives for food and try to live as much as possible even though the humans are trying to attack and capture itself. Good job by the way. :-)