I also have problems with Dangerous Skies with the Mac version once it has been uploaded to itch.io (well, uploaded to any site actually). If you look at the Dangerous Skies page you'll see that I give instruction on how to run it on the Mac (https://kevincross.itch.io/dangerous-skies). I didn't think of trying the same fix with your game because your game is showing as a document rather than an application, but I'll test it out later after work to see if it helps