Don't mean to rustle jimmies, is buzzheavier legit?
I got malware downloading a completely different game, and got paranoid.
Buzzheavier, just like Gofile, MEGA ecc. are sites that let people upload their stuff so other people can download them. If someone uploads malwares on them, it doesn't matter if that's Gofile, MEGA or Buzzheavier... you're screwed anyway. One of the few file hosting sites who checks for viruses is Google Drive, but even in this case, it only does check them if they're smaller than 50 MB.
Always make sure you trust the author before downloading things on internet. Also, if you find a malware on a game you downloaded on itch, make sure to report it to the site. If that game has a malware for real, itch will take the page down (could be a false positive too, you should check with Virus Total to avoid any doubt).