It would be nice if someone had a backup of the game, as I was hoping to try it out.
Viewing post in Can't download game The Old Man + Extra chapter
While I personally think that piracy would be acceptable in a case where the developer and publisher are unable to profit from a game, this seems kind of intentional.
If nobody could produce a contact address here, you could try to find archives of their various sites through archive.org. They might have an email - or at least further links you could try.
I hope you can solve this mystery - and maybe share the resolution with us when you do. :)