It does the same for me, but then it happens with almost any indie game I try to play, haha. It usually scans it and just decides all is fine though. That didn't happen with this one, it just straight up blocked it >.< BUT, I did have the option on my antivirus to ignore the block and run the game anyway, so if your antivirus has the option anywhere to ignore the warning, just do that and tell it to allow the game to play :3