The idea of the "Game Creation System" or "GCS" has been around for quite some time, since not everyone has the programming know-how to produce computer software, but you can be good at making games without being good at programming. Megazeux is quite a bit more in-depth than most GCS programs, which is crazy considering it runs in text mode. The first half of the video shows games made by other people, while the last half shows games I've made myself, all of which can be obtained from my website.