Arg, Start leads to black screen on Linux with Intel graphics / Mesa driver only. Will try again with Nvidia drivers installed and tell you how it goes. Otherwise, any way I can help you make it work on Linux / Mesa?
I had a look at the GitHub repo and I see 2 possible explanations:
- the version of TMPro used is not compatible with my platform (it's possible, since 2 years ago TMPro was not integrated in Unity, and could have totally supported only Windows and OSX)
- the LeanTween used at the beginning to show the Morning timer does not work on my platform
No worries though, I understand it's annoying to have to come back to an old jam game code, upgrade it to the last version of Unity because you've uninstalled the old one, make it compile again and then change something. So if it can't be done I'll just try again on Windows next.