Hiya!
I know that compiling a game is rough, so I understand if you can't add the custom text loader to the Linux version. But do you know if there's a way to poke around the downloads and add custom text files manually?
Hey! I haven't really been doing any game development in a long time now so haven't touched it. You might be able to build your own copy using Gamemaker - downside is you need a Windows/MacOS PC for the IDE still. As long as Gamemaker updates haven't broken anything it should be pretty straightforward:
https://github.com/Eatkin/Relaxing-Open-Source-Game