Hey Shroom n Gloom, I'm excited to try out your prototype. It looks gorgeous. But the MacOS X build seems to have a problem; I think it needs to be signed or something. But I'll try out the Windows build instead!

Thanks for being excited to play the game!
The issue you're running into is easily fixed:
https://support.apple.com/en-za/guide/mac-help/mh40616/mac