I stumbled upon the "Thank you for playing!" ending first. The context it gave made some of the other endings seem sad, like watching passionless creation. The narrator sounds tired. Playing this felt like watching a friend struggle and, depending on the ending, eventually find some peace and comfort. There's something heartbreaking about the line "onto the next one." I wonder what it feels like to other people who played?
The use of music is powerful. I didn't consciously notice the different recordings of the same song until my second playthrough, but I could feel the difference well before knowing what it was.