When it comes to the emotion of a song, the speed or tempo at which it is played can drastically change the feeling.
Slower songs tend to have a more somber or sad feeling. While fast songs will lean towards happy and exciting, unless it is in a minor key or rhythmically fragmented. The more broken or unstable a rhythm, the more we start to feel fear.
An article on SonicScoop called “The Resonant Human: The Science of How Tempo Affects Us” says that the general consensus was that this concept was true but we had no real evidence to back these claims until psychologist Kate Hevner Mueller began experiments in the 1930s.