Nice take on the theme, and the writing is funny.
However, the tutorial was too fast for me. Perhaps pausing at certain stages and waiting for a click or a button press would work better.
Somewhat related to that, I think the amount of item the client wants should probably be always shown unless forgetting it was part of the design. Otherwise, I would cut a wrong amount, receive some complaints in my face, have to cut again but then I don’t see how much.
Regarding the cutting mechanic itself, it would be convenient to be able to cut a piece multiple times if, for example, it’s still too big after the first attempt.
Good job!
P.S. Why is the window so tiny?