I love your concept. I would maybe add the controls to switch areas at the bottom of the screen in the beginning, because while I read the description, some people may not and could not know how to proceed. I really like that you have to figure out what people want, so if you work on this further, I would add more items and more vague requests, so you need to think more about what to serve people. Also being able to give anyone anything would give the game stakes!