I see. Thank you for your interesting answer. I'm glad I understand the design of the controll.
Although off topic. I was convinced that hunger was adopted as a measure against slow walking in common roguelike games.
The operation of the A/B/C buttons was very complicated for me. It would be nice if the depth of the menu was increased by one so that the first one corresponds to the A/C selection.
Please take my opinion as an amateur's.