I've had several people ask me about the soundtrack. The good news is that all of the songs used in the game are Creative Commons and free to download (and use with attribution in your own projects). Here is the list, with links:
Main Menu:
"Chords for David" by Pitx
Tutorial Hole and Driving Range:
"On my Way" by Kevin MacLeod (On the Incompetech site, you have to search the music by name)
Mountain Meadows, in order:
"Guitalele's Happy Place" by Stephan Kertenburg
"Paper Planes Durden ft. Airtone" by Durden
Autumn Alcove:
"Samba Isobel" by Kevin MacLeod
"Local Forecast" by Kevin Macleod
Palm Paradise:
Enjoy!