The demo's was the only thing that was available for download, then they "released" 1.0.1, but its in paid only, so none is able to get it as the game cant be bought on Itch.
The only thing you CAN do, is buying it on DLsite instead
But currently its no longer available there either because of it being reviewed.
The release date on it says its in late June, so hopefully they didnt just forget the game and made it unable to get the final version