Chrome throws up a warning on download. Autumn.zip is not commonly downloaded and may be dangerous. Discard.
https://productforums.google.com/forum/#!topic/webmasters/pV...
https://productforums.google.com/forum/#!topic/webmasters/pV...
So apparently we just have to wait until Google's servers decide my app isn't dangerous. Ironic considering I paid the $100 for Apple to notarize the app through Developer ID to remove that same warning from macOS when you first launch the app!