Bit over a year since I switched from Unity to Unreal, the game is now at the point where enough of it works that I think it might work for other people, so:
https://jeremiahfieldhaven.itch.io/project-shinar/ - Windows and Linux preview builds are now available!
If you give it a go, I'm interested in feedback, suggestions, etc - with the obvious caveat that this is still a very early preview build, so expect bugs!