This just came upon me. I have played 3D World Runner maybe a dozen times in my life. My younger self found the game enjoyable and adequate for what it was, but the music was astoundingly catchy. I haven't seen footage of the game in over 15 years and I can't remember the last time I've heard it talked about, but I can, at any point in time, and in any situation, recall the music:
Something about the nature of nintendo-era music and it's need for relatively quick repetition has made a lot of the music memorable, at least for me.
Do you have a similar mega ear worm? Is there a piece of music you've heard in a game that is burned into your mind like a hot musical iron seared your neurons?