I couldn't get this to play on my Mac even after following https://disable-gatekeeper.github.io/
Viewing post in Bug Free Gme jam comments
Hey,
I was able to get it to play on my MacBook Air (M1, 2020) (after downloading from the webpage).
I right click on the game and select open, and click "Ok" on the prompt, and then I right click on the game again and select open, and click "Open". It should let you bypass the security.
I apologize if it still doesn't work.
All the best :)