Get past the small door located on the left. You'll find a figurine - use it to climb to the upper floor. Leave the room and approach the figurine found in the middle of the next area. Use the shout to move the shadow to the left side door. Climb the stairs and use the winder to light up the floor below and defeat the shadows.
Return to the figurine and rotate it to unlock a different walkway. You should find a key - take it with you and use the elevator to descend to the bottom of the hall. Visit the room which you've had lit and place the key into the hole to unlock the way forward.
Use the figurine to summon a sphere placed in a wooden brick. Take it and return to the room with the door and turn right. Place the sphere on the pedestal in order to unlock the door leading to the exterior area. Once you've used the door, approach the stone brick with a statue on top and place it directly in the middle of the door. Pick up the sphere - the door will close, but the placed statue will hold the door in place. Use the stairs and place the sphere on the pedestal.
The door will lock shut, destroying the thorns around it. Take the sphere and carry it to the upper floor. You'll reach a large chamber - place the sphere on a pedestal to climb to the upper floor. Jump to the level below and push the new column to a characteristic spot on the ground found on the left side of the column. Activate the large sphere which will emerge from the ground and will serve as the head of our robot.
Carry the sphere to an area below the small balcony to unveil a figurine. Use the newly unlocked object to move the sphere to a nearby chamber Travel to the said room and move the brick with the sphere to a characteristic spot in the middle of the chamber. The action will unlock a new figurine, while the magnet will pull in the robot's head.
Move the empty pedestal to a new spot in the ground and use the figurine to deliver it to a higher floor, then use the pedestal to connect the robot's head with the branches. Descend below and approach the robot to begin a short cut-scene. Once you're back with your hero, approach the shining sphere and use it to transfer the robot to the field with the empty pedestal. When the robot finds itself on the field, move the column fragment to the lift and place it on a special field to unlock the door below.