This has the makings of a great game, but it is too buggy to give you more than 3 stars. I am playing it through till the end despite its shortcommings.
First of all, it is way too easy to die. Here I am, hanging out killing people, then suddenly the shark emerges from behind the rocks and eats me in one hit, even though i have maxed out scales. Why not have a mechanic where scales actually matter? Maybe it takes the shark 3 bites to kill you when you have level 3 scales?
People swim into the rocks, then you cannot get them. This is rather annoying when the sea monster is blocking your only path through the rocks. The current is rather annoying. I would remove it and just have people swim away slowly as you bite them. They would swim slower as they took more damage.
The graphics are laggy. I can play games like William and Sly on max with no lag at all, but I cannot play this game on minimum without frames dropping? This is a nice looking game, but it is not optimized for (high end?!) computers. I cannot tell if the lagginess causes the controls to be buggy or if the controls are just a bit sloppy.
The game also seems to hijack the mouse pointer and force it to be a pointer.