The arrow patterns were meant to mimic the actual process of making lemonade (as best as four direction buttons allow). Like any task it gets easier and then it starts to become second hand.
One complaint I heard when I had someone play the game was they were spending all their time looking at the arrows they couldn’t watch the animation. However, like any task, there comes the point where it becomes automatic and then its just a matter of letting your brain relax and enjoy the process.