A lil' deep diving photo taking game is such a fun concept! It'd be nice to see a little bit more information on how the photo values are being calculated, maybe a photo scoring review after you return from the dive or a little more info on the user interface.
I will say it was not intuitive to me that I needed to press 'tab' to start the dive to play the game, and only figured that out by going through the game page and pressing all the buttons (at first I though the game was broken since none of the other controls did anything while on the boat). A "Press Tab to Start!" box on screen or some similar display of what button to press would be good on the boat.