I always thought of the
first level of Tetrisphere when I heard the GCN menu music.
Ah Tetrisphere...
I have very fond memories of that game. At the time it seemed like the N64 was turning into an awesome system with games like Mario64, Blast Corps, Waverace 64, Turok, Starfox 64, Mario Kart 64, Goldeneye, and Tetrisphere. It almost seemed like it might surpass the SNES, then game the drought.