Everything is a game that seems to give you an overwhelming sense of freedom, and your actions will literally help to shape the world around you. You can play the game by impacting with objects and animals at a molecular level, or you can play the game by manipulating universes within universes. You can even change the objects in your universe to anything, including a sleuth of bears rolling through a green hillside. (Start around 45 seconds into the video to see what I mean.)
The entire experience is narrated using the recordings of Alan Watts, the British philosopher, and it gives the game a cerebral overtone to the strange visuals.
If you cannot play the game, it will play itself, based on the rules you set. Since it will continue to implement your directives for weeks, the universe you start may not be recognizable when you return. Procedural generation is baked into the game, so you should be able to make some worlds that make the levels in Katamari Damacy look bland.
If you are tired of the same old games and are looking for something experimental, check out the gameplay video. We are not sure it will clear up all of your questions, but it gives you a good idea of what you can expect. It might also confuse you more, and that may be a big endorsement for some of you.
Everything is available on PSN for $14.99.