In case anyone is scared by the quarantine, just choose the option to ignore it and download anyway. I did. And it's a fun children's game.
The quarantine on this game should be lifted immediately. The creator is a member of the AGS community, and has posted about her game there:
https://www.adventuregamestudio.co.uk/forums/completed-game-announcements/christmas-hunt-remade-an-improved-remake-of-my-first-game-74903/msg636687078/?topicseen#msg636687078
And there is another thread asking for testers, which surely explains why someone got codes for downloading before the game was made public to all.