No other music is required, obviously, and the methodology used to recreate the 1990 DOS experience here is incredibly fastidious; code is provided!
I modified DOSBox to extract the frequency/delay value pairs of the Monkey Island PC-Speaker songs.
I then used Huffman compression to squeeze all music inside an ATtiny85 (512 bytes of RAM, 8 KB of flash)
Once I managed that, I then created a small circuit with a speaker – to play the music…
…as a gift for my nieces and nephews; whom I'll see next week after more than a year's isolation (COVID)!
For comparison, here's the original (emulated):