I like the music in the game, so I searched for it on the web. I found all the tracks at ccmixter.org, except for Frau Holle's, which I found at Bandcamp. Links below for anyone else who like the music too.

https://ccmixter.org/files/djlang59/62747
https://ccmixter.org/files/F_Fact/54916
https://ccmixter.org/files/kcentric/48165
https://ccmixter.org/files/djlang59/63908
https://ccmixter.org/files/Psykick/40201
https://ccmixter.org/files/Karstenholymoly/61309
https://frauholle-music.bandcamp.com/track/sand-cave
https://ccmixter.org/files/Psykick/51943

You can also find “Sand Cave” by Frau Holle on the Free Music Archive: https://freemusicarchive.org/music/Frau_Holle/different-ways/sand-cave/

The menu music, “Work It Out” by Eddie Aich, is also on there: https://freemusicarchive.org/music/eddie-aich/single/work-it-out/