Had a search round every area I could think of/remember from the first version of the demo but couldn't find anything.
In the dark area with all the eyes (sorry I can't think of a better way to describe it), there is a window with eyes in it that you can jump up to and go through the window into a secret area with a spot where you can plant the sprout, but I haven't anything new after that. Hope that helps, and if you find anything else new let me know.