itch.io

You can also manually add the file(s) to your antivirus' ignore list but the steps to do that are a little more involved so if the steps I mentioned earlier don't work you can reply to this message and I will do my best to help you with your issue. :)

For clarification; Antivirus programs often flag a safe file as being a PUP (Potentially Unwanted Program) or Virus merely as a safety precaution... It seems to think anything it doesn't know or understand must therefore be something malicious and instead of risking the thing it doesn't know harming your computer it just says "Ok, I don't know what you are so I'm going to put you over here until I can figure out what to do with you." Unfortunately this most often happens with things we actually want to use and are for the most part as unsafe as a plush stuffed animal is to a small child (jokes). So don't be afraid if your antivirus flags something, it just means it doesn't know what it is and is doing what it can to protect you from the stuffed animals. (Ooh scary!) :P 

(EDIT) UNLESS YOU DON'T RECOGNIZE THE ITEM IN QUESTION (As in you didn't install the program or file and have no idea what it is or where it came from), IN WHICH CASE YOU SHOULDN'T CHANGE YOUR ANTIVIRUS' SETTINGS AS IT MAY IN FACT BE A VIRUS! O_O (Sorry forgot to mention that... whew) 

All files relating to this game should be safe as I'm sure Runey wouldn't make a game as good as this one (It's really good by the way Runey, Just wanted to reiterate :P) just to make a virus and install it in your stuff.