 Danny Baranowsky , the game 's composer and who previously worked with McMillen on Super Meat Boy , was involved early on with the project shortly after the completion of the first prototype . McMillen and Baranowsky worked back and forth , with McMillen providing artwork from the game and allowing Baranowsky to develop the musical themes based on that ; this would often lead to McMillen creating more art to support the music as it progressed . Baranowsky had been drawn to The Binding of Isaac as though the game puts forth a dark tone , he stated it had rather silly undertones underneath and such that one could not take it too seriously . Some of the songs were inspired by classical choral music but modified to fit the theme of the game . Other works were inspired by boss fight songs composed by Nobuo Uematsu for the Final Fantasy series . Baranowsky also had additional time after finishing the main songs for the game to craft short additional tracks that were used for special rooms like shops and secret areas . 
