This is the fourth and last group of levels. There are three levels you need to clear. Most of the goals aren't too bad but there are a few tricky ones. Try to go slowly and take your time. Sometimes, if you wait a bit, the "blocker" baby comes out and can make your life easier. I also tried to avoid the baby that licks the ball. I think it makes it harder to move the ball around.
If you can do them all perfectly, you'll get the Parfait achievement as well. Restarts are ok for perfect and you can drop the ball off the map. It only counts as a loss if it goes in a portal. See the achievement description for more details.
You'll also get the achievement for unlocking all the characters when you finish all three Queen levels.