Since it's currently online-only, you'll have a shared save file with every other pirate. Devs are apparently going to implement offline play on release, so maybe check back in 6 months once they've done what most developers do first...
The dev here, it gives me immense pleasure to see that I can find my project here on igg ( don't tell anybody, but it was a difficult thing to afford steam games for a long time). I can't promise offline mode will be as good as the always online, since my dream with it is to start eSports in quantum computing: a platform where smart people compete against each other find quantum algorithms faster than your scientists today seem to be doing. I want to see quantum applications while I'm still around, thats my motivator. Will patch the game often and for any good ideas jump on my discord! Hope this project will show you don't need academic background to contribute to quantum computing.