This gets a pass because:

- It looks awesome

- It doesn't hijack scrolling, it reacts to it, but scrolling down scrolls down, without pausing or going left and right or any kind of weirdness

- It is a large page, but not that large. In fact the two screenshots are the biggest thing on the page, the entire animation (more like a demo) on top is only 168 kB (+ the streaming music if you press play).

- If you don't care about all the fluff, you just have a blog post, you actually need to do something (scroll up) of you want to see it.

- The page is usable with and without an ad blocker. No annoyances like popups.

Also, after scrolling up, there is a 'settings' button (gear icon). Along with various options (including alternative shaders!), at the top there are 8 empty circles that are worth investigating...

I'm trying to avoid spoilers, so I'm obfuscating more specific hints:

  # A good first step (very mild spoiler)
  echo Q2hlY2sgdGhlIGNvbnNvbGUhCg== | base64 -d

  # A direct hint about where to look 
  echo RmluZCB0aGUgaGlkZGVuIGFjaGlldmVtZW50cygpCg== | base64 -d

  # A very spoilery JS statement that has side effects
  echo YWNoaWV2ZW1lbnQoJ2NodHInKQo= | base64 -d

Very nice! Even the play button has a groovy effect if you hover over it!

I used to spend an inordinate amount of time watching the 3D Pipes screensaver, wishing there was a mode that would travel along the pipes after they are drawn. This is like that but mostly its own cool thing.

Very cool tune too!