Seems a bit odd that the Windows version has a GUI but not the Linux one. Building a GUI on top of Tk (like Python does) would probably not be hard.
Not odd at all, in fact, just another consequence of the ridiculous fragmentation in Linux scene
https://en.m.wikipedia.org/wiki/Carl_Sassenrath
Sadly, they (Red) seem to have gone the crypto-funding way a few years ago.
Until a major backer steps up and funds a project with amounts that is comparable to what MS or Apple spends on their GUI, the Linux on desktop is not happening.
My bet is on QT if anyone is listening.