Nevermind - it wasn’t showing up on Chrome, oddly enough!
The button also allows you to play using the keyboard.
Les Pauls 96 birthday
[QUOTE=Fake Tales of San Francisco]
And it’s very strange how it’s laid out. Any significance to that, or is it just a design thing?
[/QUOTE]
I think it’s laid out so that you can strum different chords by mousing over the various grouping of ‘strings’. You can do a standard three chord trick going top left two-> right four -> middle (Google OOs). I dunno why they’ve got strings attached to a pickup, I presume someone there knows more about javascript than electric guitars 
What do the extra “LED” icons in that sprite do?
It’s also, of course, laid out to spell Google.
I think I’ve burned an hour of worktime with this thing.
Thank you! I was going to ask what that chord is. It is quite pleasing.
Try typing qatgyhb frdcsxa with the button lit red 
The logo itself is a combination of ‘JavaScript, HTML5, CSS, and even Flash (providing the audio)’ according to Engadget, so iPhone and iPad users would be out of luck.
It may be easier this way, since there’s less moving around:
a a g g h h g f f d d s s a
Or try this (the letters next to each other in bold are couplets):
j k l j k h j g hj k l j k h j g **hs **g g h j g j h g g g k g