That was really original ! I love the concept and the execution is on point ^^ ! The art is good and the sounds are fitting.
The "accept" button seemed a bit clunky, it took me a while to understand that I had to press it before handing money, I feel like it could be more clear with only the "refuse" button, or with a better feedback when the button is clicked ^^'.
Like others, I also would have loved a "tutorial level" with some examples of what to look for, but hey, that's already avery solid entry for the jam, congratulations ^^ !