Well this is interesting. As a little experiment, I think it works relatively well really. It opens with a blank screen and a single prompt. Hit enter and you're rewarded with a line of a short poem. You are then able to send the poem off in different directions by typing one of the words you see in the line.
It's a little sparing with instructions and you can exhaust the store of possible poems it can generate in very little time, but after taking a peek at the source I shouldn't think it would be too difficult to keep extending it's storehouse of words/phrases.
All in all, I think this was an entertaining little experiment and worth taking a look at. Just keep in mind that this was probably intended as an experimental piece and as such may be quite limited in both it's appeal and scope(although I could certainly see the latter changing quite swiftly).