[pdkl95]

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