Use physics to make a balance beam. Two boxes fall on either side. The puzzle is to lift the boxes onto the bar so they balance. But watch out! The bar is not attached so it is quite difficult.
Below are some hints if you need them!
1. Make sure to check the Physics box at the top of the editor.
2. Make a Physics object called physics and set physics.drag().
3. Make a 200,200,200 Triangle with addPhysics(false) for stationary. All the rest of the shapes will get addPhysics(). The rectangles can fall from above into their positions.