A Head Full of Dreams represents a significant departure from Coldplay's earlier work, which was characterized by a more straightforward rock sound. The album's lead single, "Adventure of a Lifetime," set the tone for the rest of the record, featuring a funky, upbeat melody and a catchy guitar riff. The song's music video, which featured the band performing in a colorful, animated world, also showcased their willingness to experiment with new visual styles.