See what you can squeeze.
Make your way to the other side of the purple plant.
On the side of the purple plant opposite of the tall green vine, get as close to the plant as you can. You should see a small, round thing that you can squeeze. Squeeze it, and watch the moths fly away from the bubbles.
Oops - I need to get back up to the big tree. How do I do that?
Can you explain what I'm actually trying to do on this level?