Game's by a trustworthy developer with a solid track record. I doubt he'd infect people, what you are seeing is most likely just another case of a false positive.
People trying to spread viruses on itch.io have done so a lot more effectively through free games. Buckshot Roulette isn't free.
its saying the same thing on steamunlocked and the icth.io version.its not a virus if only a antivirus detect a random file malicious btw i have the both versions