I've just started messing with Godot and thought I'd check out your game to see what's possible with it. Looks promising, but when I start a new game I choose New Game, pick a save slot, enter a name and click Check, and it just hangs there (see screenshot)! I do have an error at the top of the screen about not connecting to a server so perhaps this is part of the problem? I'm OK playing without multiplayer features!
I am on Mac OS 10.14.6, and I can't upload a save file as I don't have one yet! (neither ~/.local/Shipwreck or ~/.local/Shared/Shipwreck exist)
Hoping it's an easy fix, looking forward to playing!