it's a false positive.Or it thinks it's adware, which most likely means somehow you found a copy ported to an alternate website with adware attached.
He is talking about the game on Itch io, downloaded from this site from this author
No idea! Nobody else has had that issue so far insofar as I can tell, though I do know that sometimes people's antivirus gets weird about it sometimes. Something to do with this being made in an engine from 2003, I guess? Sorry for the scare!