Laura Shigihara, the adorable singer that made the "There's a Zombie on Your Lawn" song, also made the music for the rest of the game! And now the soundtrack is available for all to purchase. There's 29 tracks in all including one unreleased track called "Zombotany."
You can preview the entire thing over on Laura's BandCamp and the entire thing will cost you just $10. $10 is nothing! Nothing! BUY IT!