Glad you liked it! Even if you feel it's not a well-made comment, I'll still reply, so no worries!
Originally, it did save the songs between nights, but I didn't build the UI quite right to show how many songs were selected.
Didn't think about that until right up at the end. The number of songs was about all we could get to with the time we had and real life, the playlist we're referencing has 68 songs in it (if I remember right).
Doing rich text in Ren'Py is a little bit of a pain, and WebGL is kind of picky about how it manages graphics, otherwise I would've done more with the text.