The first capture of the page on Internet Archive Wayback Machine is from January 9th, 2016. So it’s at least that old.

Also here is a snapshot of the main page of his website from that time, which has screenshots of his games and thereby provides context into what kind of games he had made and published when the blog post was written.

https://web.archive.org/web/20160110012902/http://jonathanwh...

This one looks like it’s 3d and has a pretty unique style:

https://web.archive.org/web/20160112060328/http://jonathanwh...