The full game will be released to the public, but not for free.
Right now there is no alternative method outside of this demo (which will stop updating with one more characters intro chapters added most likely), the game is still in development, which is why it’s on Patreon. Unfortunately we don’t have an alternative for getting them as they come out other than Patreon :(
When it’s finished it will be released for sale on both Itch here and Steam.