This game looks really great, and together with the sound the ambience fits very well for the theme.
Just somehow I was a bit lost. The compass only showed me the way to the NPC, but had no money to buy something there. So tried just to dive and find something in the water, but was pretty hard to orientate there (bit too high mouse sensitivity for my taste...) and after a few seconds was eaten by a shark each time unfortunately^^
So can not really say much about the gameplay itself, probably a little tutorial at the beginning would help to understand what you have to do.
But at least running around and diving a few seconds each time was fun :-)