If there is a joke, then I guess I missed it too, but I don't think it is one. Just a small game inspired by LCD games from back in the 90's that had extreme hardware limitations. Since all of the graphics have to be baked into the screen itself, with nothing overlapping, it's a pretty tough challenge to make a game, especially one with any level of complexity. The fact that he managed a randomized game with puzzles and even different levels of completion is very impressive. If you aren't familiar with those kinds of games though, search Youtube for "Tiger Electronics" and you'll find a bunch of videos showing what they were like.