It's hard to describe. When I start the game, a cmd window will pop up, and then there is a white window animation that repeatedly goes fullscreen (but each time it reaches fullscreen size it reverts to windowed size from one tick to another), this will keep repeating for the first 15 seconds, then the speed and frequency of the fullscreen animation approximately doubles, then after 15 more seconds the whole thing stops (and lix.exe is closed).
When doing lix -h, I do get the text output. When trying lix -w, I do get a lix program running in the taskbar, but no visible window. However, when I hover over the lix icon in the taskbar, it will show the normal Lix main menu (asking for first-time player name) in the mini-preview window.
One more peculiar thing, it seems to accept keyboard inputs, as I was able to enter my name, hit enter and then it showed the main menu.