Don't play this game. It is addictive as hell. It's like The Incredible Machine games, but you have less stuff to work with. If you're smart enough (and you'll need to be to finish all the free levels), you can actually make catapults to get to your goal.
Here's a possible solution for the fourth level, for instance (MY solution, btw, you can save and exchange these things): http://FantasticContraption.com/?designId=1213156
Here's a possible solution for the fourth level, for instance (MY solution, btw, you can save and exchange these things): http://FantasticContraption.com/?designId=1213156