Hello,
I recently tried LoG2 on 4K and found that the UI scales to 4K as well, which in games is not optimal most of the time as the UI becomes too small to deal with. Most games scale their UI on 4K in a way that its relative size is exactly the same as on any other resolution. I would very much like to see a similar update in LoG, since the game is very hard (and unenjoyable) to play with such a small UI. I know nothing about the technical aspect of it and how large of an undertaking it would be, but Psyonix for example added an update to Rocket League that made its UI scale to 4K recently, so I think it's reasonable to make this request. If you decide not to make such an update, I at least hope Legend of Grimrock 3 (which I hope is well on its way ;D) will have a UI scaling option.
PS. Varmasti paras peli mitä oon pelannu viimesen 5 vuoden aikana. Kiitos mahtavasta pelistä!