hi, your game looks awesome and definitely has potential!
I feel like a shipwreck or at least some “events” for more money or special edition items would make the game a whole lot more interesting, so maybe you could add it.
The shop one feels a bit generic to me, it sounds cool but thats basically making the game into an RPG with character stats.
Clothes would be cool, just don’t make them for robux, especially if they are special event clothes. I feel put off by a lot of games where you need to use robux for everything.
Weapons wouldn’t fit, I don’t think. But possibly you could use them to defend against pirates? Maybe ships that come to your island to try and attack, and when you defeat them, you get a shipwreck to loot.
Sounds like a cool game though, I hope you have fun developing it.