as for the part at 1:13, in japan, gohan can refer to a meal in general rather than specifically rice. so it would make more sense for it to say "Today's meal is..." instead 🙂
the funniest thing about the song is that when it starts talking don and already repeatedly it's the game chart it's not just random dons and kas but the game chart at the master level "'It's just that from time to time in music, if you do well, the difficulty of the notes in extreme is equal to the music score at the end"'