As a coder I too feel intimidated by these impossible 4 KB Demos. It is also important to remind oneself that the optimizations to do this stuff are mostly mean

As a coder I too feel intimidated by these impossible 4 KB Demos. It is also important to remind oneself that the optimizations to do this stuff are mostly meaningless for making a game. You are mostly constrained by time in a project, and shouldn't distract oneself in being cute with neat tricks.