Hahahah, super charming and funny, loved it!
Only super minor feedback: some of the jokes in the vocal performance were spoiled by the whole line's text being visible, maybe if the text scrolled visible, some the bits would have landed even harder? At the same time there's a lot of back-tracking and replaying so you do want to minimise the amount of clicking the player had to do, so meh. Also, it would have been handy to see which runes we had collected, just to help keep track, but that's such a tiny nit-pick, I was more or less able to keep track anyhow.
Amazing job, got many genuine chuckles out of me!