Hey Doroc! Unfortunately the game's UI doesn't support 32:9 right now. You should be able to select it from the Resolution dropdown option but a lot of the UI will get cut off. If possible, I'd suggest playing the game in Windowed view by unticking that Fullscreen option. You shouldn't see any of these stretching issues in Windowed view but feel free to reach out if you still notice any weird behavior.
Sorry for the trouble, getting 32:9 resolution is tricky and I'm trying to figure out the UI support for it but I appreciate you checking out the game and hope you're able to enjoy it still in Windowed!