[xyst]

just keep in mind, this person claims to have taken a few months to write this. I wouldn't worry about it. It's interesting never the less.

The last time I have seen this low level of code was in a college level course about assembly language.

[DC-3]

As a comment on the linked post notes, this is impressive enough that it could probably be the basis of a degree thesis. An astonishing exhibit of technical skill, very much a masterpiece in the original sense of the term.