Loved discovering the theme - it was really cleverly implemented and I liked that the theme told a story through the revealer! If there was one thing constructive I could say it is that a few clues (e.g.
13A13APlayed music... Might be used to call your grandma?
[----------] ) had the fill in the clue (grandma > GRAM) but in those cases you can usually just replace with a synonym.