This level will take a while to get with only 1 hit. Your aim here is to hit the bottom rock, causing it the wood to bounce and hit the higher rocks. To get 3 stars, (most likely) you will have to do it within 1 hit. Once again, it will take some time to get the right spot.
[youtube width=420 height=345 time=53]http://www.youtube.com/watch?v=0Yq0eleZmy0[/youtube]