Well, I was playing in landscape mode. The problem is that this game doesn't use letterboxing (black bars) to retain a 16:9 aspect ratio. Instead, it stretches the image to fill the entire width, resulting in the scenes being stretched (annoying but not game-breaking) and buttons on the top/bottom of the screen being cut off (which is a problem that affects gameplay), as if there are more space beyond my screen.
And I had no luck finding anything useful in Android developer options. Guess I'll just have to play on Windows.