Thanks for the feedback. Since you are a Godot developer and use a MacOS, may I ask how you export your game? Is there any specific settings I have to adjust? Cause I have no possibility to test it on a MacOS and blindly trust the Godot export.
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So I'm actually quite new to MacOS, so it might have been more my fault, but I think the error I was getting was due to the export not being code signed (https://godotengine.org/article/godot-3-3-has-arrived#macos) which might only be possible to do when exporting from MacOS.
I was able to run your game after modifying the file with this command:
xattr -d com.apple.quarantine [path/to/file]
It might not be a bad idea to add that line to your download instructions to help anyone else on MacOS who runs into the same issue I did, but after running that command It worked without issue! Sorry for the false alarm!