Some of you might remember when a 3mb flash animation could pack in some 5 minutes of animation, with the more advanced ones even having chapter/scene selectors, which could also include clickable easter eggs and other kinds of interactions during the scenes.
There were lots of programs for making Flash content though, and there was a lot of knowledge about how to make stuff in it. There isn’t the same culture of remixing stuff now. More interactive web games are also more server dependent even for elements where they don’t need to be, unlike tons of old standalone flash games