Guardian of the Tree

Oi! You there! Have you seen those big shiny trees in the neighborhood? Yeah, well, some nasty little creatures keep popping up to burn them down or nick the goodies. Unacceptable! That trees are under official goblin protection! So here's the deal: I need you to get rid of those creatures when they appear. Punt em, fling em, smash em, I don't care, whatever you have to do to protect the tree. I've set up some practice dummies for you to get the hang of things.