In terms of chords and melody, Super Mario World - Fortress is more complex than the typical song, having above average scores in Chord Complexity, Melodic Complexity, Chord Progression Novelty and Chord-Bass Melody.
Super Mario World - Fortress has sections analyzed in the following keys: F Dorian, and C Minor. Click on the linked cheat sheets for popular chords, chord progressions, downloadable midi files and more!