Im at a point where i feel like i played the game till the end, but i still cant have sex with autumn and it says that the dev has not implemented that yet. Will there ever be an update or no
Follow the creator on here and you can follow along when there are updates - and read the Dev Diary as well as looking at the release schedule so far if you want a rough idea of the game's progress.
As for keeping progress, just make sure when you install a new version of the game that you keep your "saves" folder, which is in the "game" folder in the game's installation.