Even though most challenge levels only have one solution don't be afraid to experiment as there is often a bit of leeway as to where you're supposed to place your pieces.
Inspiration
Download a few users' levels for inspiration when you are having trouble deciding what you want to build in the Sandbox mode.
Inspiration
Download a few users' levels for inspiration when you are having trouble deciding what you want to build in the Sandbox mode.
Remember Solutions
Lots of the challenge levels use the same basic physics principles so try to remember the solutions as you will probably have to build the same thing again later on.
