If you're interested our Patreon has development updates every week on Friday and they get the new version a month ahead of Itch.
As for Damien, yes he can be romanced in the Demo! I'm also very interested in what you'll think of his routelock event.
The Demo is in of itself a completed product that's getting polished a finished up, right now we're just working on the "After Story" portion of the game, and right now we're focused on getting the Bakery route finished.
So the Patreon/Paid version features updated sprites and 20+ new events for the bakery route.