In terms of chords and melody, Heaven has complexity on par with the typical song, having near-average scores in Chord Complexity, Melodic Complexity and Chord-Bass Melody and below-average scores in Chord-Melody Tension and Chord Progression Novelty.
Heaven has sections analyzed in the following keys: E♭ Major, and C Minor. Click on the linked cheat sheets for popular chords, chord progressions, downloadable midi files and more!