Hello! Any progress since you posted this? Right now there's no way for games to store anything reliably unless we force players create an online account with some third party, which makes me sad :(
I have not solved the problem and use playfab. It is still very uncomfortable.
But maybe something has changed since that time, I don't know.
And what service do you use?
None, just localStorage. Updates will nuke people's highscores and settings, which gives people a reason to buy the desktop version I guess...
@FrozenFractal, can't see why that would be, you can make people login with Itch and get their account information (unless you consider Itch to be third-party relative to your game).