Ok and what did Infiniminer copy? What about games like Papers Please or Obra Dinn, or Blue Prince. Yes, games can have different influences, but the idea that everything is a copy is totally incorrect. Some stuff is way more unique and original than others.
You seem to be taking "copy" much too literally.
"Blue Prince" is heavily inspired by earlier works, those works just aren't video games. You could say the same all the way back to ADVENT, the Colossal Cave Adventure of the 1970s being inspired by adventures in an actual cave.
Of course good games do something we haven't seen before or do it better, but they are also invariably products of a wider culture. A big part of why Animal Well doesn't need to explain itself is that a modern video game player knows how this sort of game works and so when they get Slink or B Wand or similar they realise they can explore places they couldn't reach before.