itch.io

No, i have noticed when publishing/trying other games on itch.io that aren't made by "publishers" it gets flagged. Its all good and if you want run it through malwarebytes

that almost always happens with itch.io games, doesn't mean it's a virus

It means your machine is infected with the Microsoft virus.   If that is on purpose, you can ignore it.  It is not a problem on non-Microsoft operating systems.