The screen showing the controls is missing the interact button.
Viewing post in Aimi No Toraburu jam comments
It's too late now, I guess, but either after the contest or in future work, I would recommend putting all commonly used buttons in any list of controls you include. Such a list doesn't just say what the buttons are. It also tells the player what they should be trying to do regularly. In the case of this game, I got the initial impression that I only needed to walk around.