He kinda (but not fully) admits that he had a parasocial relationship with Notch and really though he cared about him (although for Notch the author was probably just a random contactor who would fill the writing for the ending to justify an official release.) Seriously, who thought making the text unscrollable was more than just a light joke? It's probably a jab at the frustrated player who wants to desparately skip the poorly-written wall of text, not a well-thought appreciation of its artistic integrity! He really thought that Notch really liked him as a friend, even though the only time he met him in person was in a random game jam two years ago.
I think the lesson here is: even when the famous person you admire notices you and gives you positive attention, don't assume too far that they really genuinely like you, or even worse, that you two are already "friends". Maybe this is a bit cynical... but in an age where poor artists need to fight to the death on social media for any recognition to sell their work I kinda understand how people would fall for this.