How do I Improve This Angry Bird Style Game?

I'm tweaking Construct 2 catapult example, whenever you touch the layout, the aiming process will be automatically initiated

I want the process initiated when player touch the "piggy" to be thrown off, if player touch other part of layout like the sky, nothing happen

Whenever I set the "is touching" to "is touching piggy" the piggy refused to move and fall off directly on spot