the game is not playable on an ultrawide monitor cause it zooms in and cuts of important parts, there are no options visible to change the resolution or fullscreen/windowed mode
this is a quick workaround for people like me with the same issue
You can add command line arguments by running the game in a console like so (windows cmd)
nidaros.exe -screen-width 1920 -screen-height 1080
to play the game in a FullHD resolution