In terms of chords and melody, Guillotine Dance is more complex than the typical song, having above average scores in Chord Complexity, Melodic Complexity, Chord-Melody Tension and Chord Progression Novelty.
Guillotine Dance is written in the key of E Phrygian. According to the Theorytab database, it is the most popular key among Phrygian keys and the 43rd most popular among all keys. The E Phrygian scale is similar to the E Minor scale except that its 2nd note (F) is a half step lower. Chord progressions in Phrygian often rely on the major chord built off of this 2nd scale degree (F major) which gives the key its distinctive sound. See the E Phrygian Cheat Sheet for popular chords, chord progressions, downloadable midi files and more!