What's more, Spirit of '77 is going onto Kickstarter in early September (as of this writing, about a week away), and, to help you decide if this is your kind of game, the guys at Monkeyfun Studios have a free adventure to check out -- The Cruise Ship of the Damned.
The PDF sits in at 49 pages, nearly half of which are the rules which give a thorough understanding of how to play/run the game. Honestly, you're given enough to start creating some simple adventures/campaigns of your own with just this PDF. There are no character creation rules, but there are seven very interesting pre-made characters (complete with images).
It's a solid adventure and introduction to the game, in general. The amount of content there is more than worth checking out, especially since it's free. And, heck, just reading it is pretty entertaining -- a lot of the writing, especially the examples, are pretty evocative and show how much the developers really love this setting and style.
Also, they have a Spotify list linked on their site, with indicators of suggested songs to play throughout the adventure. I'm not certain how effective it is in practice, but it certainly helps get you in the mood for the game.
If you're interested in learning more (or want to snag a copy of the adventure) be sure to check out Spirit of '77's website, Facebook page, and Monkeyfun Studios' website. And keep your eyes peeled for the Kickstarter that's opening soon.