This isn't a huge suggestion, but I played through the game for quite a while before realizing that "Companions" was a separate tab from items when trading with the rat. The positioning of the text makes it seem like your companions would show on the right, and items on the left. I thought it was just glitching and not showing the companions for me, and it wasn't very obvious that you had to click on the word to go to the other tab. Maybe if you added a graphic at the top, sort of like browser tabs, it would be a little more obvious?