Jesse Stavros Doorway is a mid length game about a collection of people with the ability to travel through space and time. There is a good chunk of backstory available in-game.
The game is large, with complex implementation, but it needs more beta testing; there are capitalization errors and "printed name" inform issues.
The setting is interesting, with a bunch of hippies time traveling to a grateful dead concert. The writing is descriptive.
I played with a walkthrough, as many actions were hard to come up with on my own.