Ah, the bit about it being the full game wasn't clear. Thanks for the clarification, and for trying to provide a build.
I'm post-Catalina (macos 12.2) and it appears to work fine (sound, control, transitions, etc.). The only thing is the first time running it, the user has to right click on it and choose open (which is standard for unsigned apps that didn't come from the App Store). After that it starts normally.