I was really into this, until I ran into:
It appears your browser does not support 8 of the CSS3 properties used by Alice.js. Please use a WebKit-based browser like Chrome, Safari or the PlayBook Browser.
I could not figure out exactly what those properties are. I am running FF9a2 which should support pretty much everything Chrome does. The big thing FF lacked until 5 was the keyframe animations.[1][2][3] So not so useful to the world at large yet.
It does look like a nice library otherwise.
[1] https://developer.mozilla.org/en/CSS/CSS_animations