Great that you found it. Apparently there is a 1.0.2 version that has been out on steam since the 12th - that build has some bug fixes and quality of life updates. I don't know what's happening here on the itch.io version since it says they updated the page 4 days ago (the same day of the 1.0.2 release on steam).
So itch.io customers are getting shafted or they're having some difficulties. Hopefully, it's the latter.
I'd recommend anyone interested in buying this game to get the steam version.
It's not DRM-free but the ease of access to get the R18+ mod, and future updates on the dot make it worth the inconveniences. Also you get the added benefit of trying it out for 2 hours and refunding it if you don't like it.