While I don't like point and click adventure games, this really is good. It's mostly because of how good the artwork is. I got a really good feeling of detail playing this. I think the main pirate is himself some fish creature. It was weird to see him like that. I like the creaking of the chair(s?).
You have created a great atmosphere. I have no idea on what to do with the chest. I haven't gotten far at all. Isn't Tortuga some Mario villain? It just sounds familiar.