At the very start, turn around to see a rock covered in flowers. If you stomp or double jump on it, you will be taken two a bonus with lots of worms in wells. Go towards them, then step back so they do not kill you. When they go in again, jump into the well and you will land on some jelly. Jump on the jelly to get a heart if you are in the center. Keep doing this on the rest of them of them.