I'm not sure if anyone else has encountered this, but I initially found this game to be borderline unplayable on my ultrawide monitor, as it cut off the top and bottom of the screen. It's common enough for games to not play nice with ultrawide, but typically you can go and adjust the resolution or play in windowed mode and resize - not so for this one.
The solution that I found was to put it in windowed mode (press Alt+Enter), then relaunch with a program called ResizeEnable running. That program forces windows to be resizable.
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