There are multiple things in the game that hit me personally, such as the "See you later," thing. I very much did get something out of reading while listening to the pillows' song. The UI of the game and the backgrounds of the page are an excellent example of combining them to make the experience that much better. I loved Caspian and the little gifts.
Alone, I am moved by the game, but with the pillows playing (as recommended), I am beyond tears.
Truly a wonderful game and I had a great time reading it. And I hope you know that despite the difficulty you had in finishing it, it was well worth getting the chance to read it.