Not sure how feasible this is... but I wondered how easy it would be to build some sort of engine/library/framework/template even for text-based adventure games.
Sure, it's not the most exciting format. But, if it's a case of a few different sprite/scenery images etc, and some text files and logic/decision flow (if yes, go to X if no go to Y).
Hikachi's post about "Unseen" had me thinking about this basically when they said about the game engine being done.
That way, I could come up with a story, and different outcomes etc. Then basically static graphics, maybe the odd moving thing, and some music? Not saying that's easy, but... easier?