Ron didn’t speak. He didn’t move. His eyes were fixed on a point some ten feet above the Forest floor, right behind Harry. His face was livid with terror.
This moment has no zoom levels as such, being a minigame where you try to keep spiders at bay. You have to balance this with trying to find items.
Click on the two items and collect them right away. Then focus on the spiders. Click on a spider once to have it retreat. The closer they get, the harder it is for them to retreat. Focus on clicking on each spider as soon at it appears in the clearing.
You can hear the wind moaning, the occasional bird and some creaking trees.