On the Sega Master system version, here are the names of the KNOWN Lemmings musics:
Bold entries were unique to the SMS version.
All tunes were composed by Matt Furniss
JUST DIG - Can can - Jacques Offenbach
YOU NEED BASHERS THIS TIME - Dance of the Four Little Swans - Tchaikovsky
AS LONG AS YOU TRY YOUR BEST - Dance of the Reed-Flutes - also Tchaikovsky
EASY WHEN YOU KNOW HOW - Don't Dilly Dally on the Way - Charles Collins NOT AS COMPLICATED AS IT LOOKS - How much is that Doggy in the window? - Loulou Gaste
PATIENCE - London Bridge - ?
ORIGINS AND LEMMINGS - Miniature Overture - TchaikovskyKEEP YOUR HAIR ON MR LEMMING - Ronda Alla Turca - Mozart
DON'T LET YOUR EYES DECEIVE YOU - Scotland the Brave - ?DON'T DO ANYTHING TOO HASTY - She'll be coming 'round the Mountain - ?
Amiga version differs, but I thought I'd drop this in. Other levels I do not know