I’ve added a new JavaScript 4K page will host JavaScript games that are contained in one html file which is no larger than 4K. This is an even more difficult constraint than the Java 4K challenge since the Java files are in compiled bytecode whereas Javascript is at most minified source code.
The gallery currently contains only one game which I wrote a few years ago during a short break on a PC with no Internet connection, development tools or ways of saving the data to external devices. I kept a printout as a souvenir which I recently found and which gave me the idea for the JavaScript4K gallery/contest. If it picks up, I’ll make it a site of its own.