It's a unity file, it doesn't have viruses. Why would I publish viruses on my gaming profile? Just look at my other games here. You can play it cool, it's a unity build with installer.
No it's impossible to install, the antivirus delete the file immediatly after the detection of the supposed virus. Is it possible that Unity added something that can be identify as a virus after their recent annoncement so they can detect how many installations devs get ?
This sometimes happens with the games I download from Itchio. When this happens with the games I download, I allow it, there is an antivirus that actually deletes it.