In terms of chords and melody, Main Menu (Transport Fever 2) is more complex than the typical song, having above average scores in Chord Complexity, Melodic Complexity, Chord Progression Novelty and Chord-Bass Melody.
Main Menu (Transport Fever 2) is written in the key of D Dorian. According to the Theorytab database, it is the most popular key among Dorian keys and the 29th most popular among all keys. The D Dorian scale is similar to the D Minor scale except that its 6th note is a half step higher (B). Chord progressions in Dorian have a characteristic sound due to the major quality of the chord built on the 4th scale degree. See the D Dorian Cheat Sheet for popular chords, chord progressions, downloadable midi files and more!