I'm sorry, maybe I expressed myself in the wrong way (language barrier is a bad thing): what I meant to say is that the game doesn't work on my iMac of the late 2013 (where I usually play the game) and it doesn't function normally on my new MacBook Air (with M1) either. In my first comment I wrote about the MacBook Air because I thought that the iMac could have been too old for the new version of the game and I even heard that some games made with Unity showed some bugs when played with M1, so I tried to install the game to see if it worked there (and unfortunately it doesn't).
Thank you for your time and your suggestions, I'll make sure to follow them. I'll text you if I find any solutions, in the hope you'll reciprocate.
Best regards