These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Earworm: The high score song most definitely is. You may also find the built-in soundtrack to have a couple ("Universal Dance" is the most frequently cited one). Plus, the swappable nature of the game means you can always provide your own, provided they're standard CD format.