Allright, I think I find out the solution: the current version of the game was simply not built for Silicon processors.The Mac version doesn't work of MacBook Air M1 (apple Silicon processor).
It just says "Cannot open" (it's not the thing about security, I run all Ren'py games without problems)
I also can access the packages's content.
I made a new build with Silicon support.
Download it from one of these links:
- MEDIAFIRE:
You must be registered to see the links - MEGA:
You must be registered to see the links