Thank you Job.
I’ve compiled the source code, and I bought it from here too. I had to install Node.js and a newer version of Python as my macOS 10.14.6 is stuck with 2.7.
It really does run great, thank you for making the source code available so anyone with a Mac can enjoy your lovely game!
PS There’s a very small issue with the game not quitting through the “Save & Quit” menu item. If I click that, the main window disappears, but the application is still running (in the menu bar and looking at the Activity Monitor, there’s the 4 processes still active). Command-Q quits the game just fine though.