This is a cool hack, but it uses the Finder/file system as a graphics system, but isn’t really implemented in it. When I read the title, I expected it to use f

This is a cool hack, but it uses the Finder/file system as a graphics system, but isn’t really implemented in it. When I read the title, I expected it to use folder actions (https://developer.apple.com/library/archive/documentation/LanguagesUtilities/Conceptual/MacAutomationScriptingGuide/WatchFolders.html https://developer.apple.com/library/archive/documentation/La...) to obtain user input. That, IMHO, would be slightly more “implemented in MacOS Finder” It might be too slow but you could, for example, have the user drag a window around as the game controller, and have the main game loop create a file in a directory to trigger a folder action that runs the main game loop again. Also, can’t you avoid the AppleScript startup problem with a stay-open AppleScript that you send events?