[Denis ROBERT]

If you have time to waste :

Video :
To play : https://across-multiverse.com/

All in JavaScript and open source

[infurl]

Be careful that you don't get motion sickness. 

[OllieGee]

I like this.
The video doesn't exactly explain or give meaning to what is being played out, but the wording 'Across the Multiverse' implies traveling or transcending across vast planes at vast speeds... Good soundtrack too...

[8pla.net]

All in JavaScript... Wow!