I just wanted to add that the "Battleship" theme is somewhat UNIQUE. Most games are not about Naval Warfare... On the opposite end of the spectrum, many, many, many games are about dungeons, dungeon crawling and medieval fantasy.
Not to dissuade you in any fashion. I'm just pointing out that a lot of "medieval fantasy" games exist. While "Naval Warfare" games are probably LESS in numbers, because it is a less used theme.
Again feel free to continue exploring the "dungeon" theme. I'm just saying that your "Naval" theme is more unique and less common.
Best of luck(!?) with your game.
Cheers!
I’ll probably start a new thread with the theme change. I have a few unique dungeon ideas that weren’t possible with the naval theme.