Very chill, very relaxing and decently smart AI. This is an amazing implementation of a very simple idea and it feels cozy. It's hard to find something to improve upon, you have a good amount of feeback in your UI and a very cohesive style, but I guess you could lean into the UI feedback even more. Text that moves in with your character for example, or more stylized text boxes. Maybe some more character personality? Make them more characters rather than difficulty levels. There really isn't much to imropove on, this is fantastic.