Correction: Don't play the bird and elephant's level of We <3 Katamari just before going to bed.
No, wait: Don't play the bird and elephant's level several times in a row because you want to break 1000m and roll up the Petronas Towers and St. Basil's Cathedral, hidden way off across the world map, just before going to bed.
Also: Don't repeatedly play the bird and elephant's level and continuously insist on Katamari On The Swing as your background music because the Japanese Tom Jones cracks your shit up. Just before going to bed.
Nine hours later, the song is still in my head. OKAY MISTER SUNSHINE!
but I did learn that once you reach 1000m on that level, your view goes up beyond the usual sky, the screen begins to turn cloudy white, and the background music begins to change to the gentle happy cloud music. But I still didn't make it back to the damn Petronas Towers though.