Was the crystal formation near the tree meant to do something? I couldn't get it to do anything at any level.
The plants are a little difficult to get to light up so I can interact with them. I had a few plants that grew a bit, but never seemed to ripen.
EDIT: Are the mushrooms in the forest meant to do anything? They glow red with little particles around them like maybe they're meant to be important, but I didn't notice any effects if there were any.