If you're looking for a head-scratching collection of puzzles to solve then downloading Crazy Machines is a real no-brainer.These Rube Goldberg-style contraptions challenge players to drag and drop items onto the screen in order to accomplish a specific goal. One might be for a ball to fall into a bucket, steam to blow out of pipes or aligning gears and rubber bands to move an item from one area to the other.In short, while the game isnt much to look at (its sequel is much prettier), Crazy Machines gives you one fantastic cerebral workout.