More info in the documentation

I would like to see more things in the documentation, such as nice tricks people can use:

Such as (to handle multikey input):
var keys = [];
var keyPressed = function() { keys[keyCode] = true;};
var keyReleased = function() { keys[keyCode] = false;};

Maybe you can consider letting the community manage the documentation, like one of those wikipedia-like structures where the community can contribute to.