Theme 22-9 is the ninth level of the last world of the episode Bad Piggies.
One strategy for Angry Birds Bad Piggies level 22-9 is to send the Blue Bird towards the hanging wooden wheel. Split before impact so that at least one bird finds its way to the far right pig, while the other birds push the wheel to the right. It should roll down towards the bottom pig in the cave. Then use a second bird to clear any remaining pig.