I got it for free from a friend on the advanced media network boards I admin. Came today, and it's the Japanese one. Aside from the descriptions of the creatures it's all in english not that it would matter regardless.
Yes it's very tech demolike, but it's just a piece of creativity you can mess with for a few minutes every day or few days and just make something entirely new every time as it's never the same twice. A few of the creatures even have some extra crap you can do as a bit of a challenge like the hanenbow with their launcher and bounding off leaves, if done right all go red and can sprout a flower. That is a game in itself kind of like gorillas from old dos or scorched earth without the death (playing with angles and projectiles.)
Oh and since it was asked the US ver is game alone in box, no wider shiny cardboard box and no cheap earphones.