Thanks for the help, yes there is a snapshot on archive.org
https://web.archive.org/web/20200806124202/okamizt-studio.itch.io
But i can't find more info, his youtube channel is also down.
Viewing post in Can't download game The Old Man + Extra chapter
Sorry that didn’t work out. The only other thing that I could think of would be to reach out to somebody who covered one of Okamizt Studio’s games (a games journalist or a YouTuber). While they wouldn’t be able to provide you a copy, they might be willing to share an official email address for you - or might even know what’s going on with that studio.