If it still doesn't work, I'll need more details about what the issue was, because I have it running on my MacBook Pro.
Are you on Big Sur by any chance? It seems to be causing issues with the .app files that Unity builds.
One fix to try is running something like this in a terminal:
sudo chmod -R 755 'PathToAppFile.app'
That will set permissions to let you run the app as an executable, which solves one of the potential issue you might be hitting.
Then you might still have the usual Gatekeeper warning about not running apps by unknown developers (i.e. me). You can sidestep that by going to System Preferences > Security & Privacy, and clicking the Open Anyway button on the General tab. Alternatively, you can disable Gatekeeper altogether, but I'll leave you to figure that one out.
Agreed about the text. I've since learnt more about rendering text in Unity, so I'll have more font options in future.
On the torch not always setting things on fire - that's by design. A single torch isn't hot enough to ignite certain objects, like a tile-clad roof. The idea is for you to have to find more flammable objects to ignite first that allow the fire to spread to the more stubborn areas.
That said, some levels contain objects that look like they should catch light more easily than they do. I had to fudge the numbers to make the level more interesting to play - room for improvement there.
