I can't believe no one I've seen has called out the secret game! Go to Settings>About and then hold the center button for 5 seconds. I used to play so much of this bricks game in college when procrastinating from studying in the library.
It's a Breakout clone. I mean that's what they're generally called in case you did not already know this.
HOW DID I NEVER KNOW ABOUT THIS!!!!!!
Also, holding down the menu key for a second turns on the "backlight", like the real iPod (for those that don't know).
Though it's cute that it's the 404 page, you can get to the page directly via https://music.apple.com/us/ipod.
I remember loading this game on my video iPod back in 2005. It’s a tragedy that I never knew I could just play this through an Easter egg!