I love the game and I'm playing it on Steam Deck. It's flawless at 6W TDP (over 4 hours per charge). Except this one thing. It shows 1280x800 in game, but it runs with black bars (like it's in 720p).

Not usually a problem for other titles, but I wear glasses and my eyesight is not what it used to be. The text is really small. I think having the game full screen would make the text a bit bigger.

Please check this and fix it (if it's a bug). If not and it somehow works full screen, please let me know if there is any tweak. I tried forcing both Native and 1280x800 in Properties. It doesn't work.