Thank you for the kind words and feedback. I'm definitely working to brush up the edges and implement some of the unfinished portions.
I did include a recipe book to the left of the input display, which I should have labeled better! The customers should be able to be sold to if clicked on, but you are right! I missed a bug which blocks their actual body from being clicked.
I'm going to make sure to improve these things and then I hope you'll try it out again!