Hello! Just a good Samaritan here. I wanted to help my fellow MacBook users who are having trouble downloading this game. (This is probably more relevant to users with the latest MacBooks, but I'd be happy if it helps anyone else too!)
For reference, I'm using a MacBook Neo, but I'll assume the settings are generally the same across devices.
The issue I encountered:
First, open System Settings! (I think it's just called Settings on some devices.)
Then, locate Privacy & Security. In my case, it already showed me the app that had been blocked by Apple's security settings because it was from a third-party source.
Next, click "Open Anyway." You'll be asked to enter your password afterward.
Once that's done, you should be able to launch and play the game! <3
Hope it helps!!! ٩(ˊᗜˋ*)و ♡