This is the source code for the iOS/tvOS game (supports iPhone, iPad, and tvOS), Pilot Ace -- https://itunes.apple.com/us/app/pilot-ace/id833488539?mt=8
This code is maintained in a separate, private repository. Starting with v2.2 and all subsequent versions, the final codebase for each release will be updated here.
I hope this may help new Objective-C developers or new SpriteKit developers learn something new.
If you spot any issues or have improvements, please submit a pull request.
Note: This requires Xcode 13.2