Hi, I'm encountering the same problem that the commenters below have had. Also MacOS Catalina, 10.15.4, 2017 MacBook Air 13 inch. It's not a problem of security settings, I've dealt with that before. When I try to open the app it just says "can't be opened." Trying to use TweepCoding's fix but frankly I don't know jack about code so I'm having a bit of a struggle. Would love to play your game though, it looks lovely!