Fantastic experience. Really good all around.
I'll second some comments already made. Some way to make the customer repeat the order is an urgent must. Maybe have the customer repeat the order when they get the wrong stuff instead of the wap-wap. I got stuck in the tutorial because I couldn't guess one of the coffees I didn't hear when ordered. And yeah, a way to skip the tutorial.
But the game is just beautifully thought and made. The sound is fun, clear, and helpful. The graphics are sharp and simple and helpful even without my glasses. The whole package is just tidy and fresh. Amazing job.