That's less than the cost of a candy bar (or, for my many uk friends, a chocolate bar.) Go and buy it already!
Quoting from the Aberystwyth gaming board:
Looks really interesting but I'm not sure if I should fork out for it.
Will you please tell us more about how it plays?
Um... I don't really know how to?
Did you look at the slideshow? http://sleepisdeath.net/slideShow/
There's a bunch of videos with technical details on how to play the controller, too: http://sleepisdeath.net/videos.php
But basically: The controller has as much time before the game as they want to create and edit resources (sprites, objects, scenes, music) as they like, then 30 seconds to load/set up the first scene. The player then gets 30 seconds to do their bit (speak, do an action, move their character wherever is walkable). Then it's the controller's go again - they can modify the scene, make things speak, change the scene in response to what the player did.
The game saves a slideshow as you play - a bunch of people have uploaded theirs: http://thecardchest.com/sid/
It's like a two-player systemless pen and paper RPG. It's like telling a story to a precocious child. It's like watching a TV show, but getting to say what the main character does. It's like making a comic strip, where each panel has to be finished in 30 seconds, and somebody else is writing the hero.
The game's even better than ever, since Shannon Galvin made a bunch of high-quality assets for it, and some tutorials on how people with talent can really make the game look great here.