Only to a certain extent. If you paid money for the game, that just means you supported Hexatail. You're not getting a different version. If you are a patreon then you get early access to the game, but it is still the same one that is eventually getting released publicly.
Generally speaking each person publishing their games sets up their own rules for their works, so you should either look around their page for some info on how they handle things or question them if they don't seem to have anything posted.
