So what exactly am I looking at here?

I've got some cool music and some flashy pictures - where's the About page? :)

Probably a demo for the soundcloud player in the footer

- http://jxnblk.github.io/plangular/

The second link [0] is down though, so I don't know what that's about.

[0] https://github.com/jxnblk/gitfolio/

Appears to be a typo - https://github.com/jxnblk/gifolio looks like it

Looks like a portfolio (http://mrmrs.io) turned into a gif-music-video.