This is a complete walk through for The Room Chapter 1 by Fireproof Games.
2. Key: You will need to find the lens for the eyepiece and open the safe. Each leg of the safe has a element. The answer to the riddle is fire. Press on the fire icon. A secret compartment will open. Grab the Peculiar Old Key. Look towards the top, there is switch. Slide the switch to the left will reveal a keyhole. Insert and turn the Peculiar Old Key. Grab the Ornately Engraved Metal Plate from the hold open to the right.
4. Eyepiece: Go to the side with a circle in the middle. Look towards the top, there is similar switch. Slide the switch to the left will reveal a keyhole. Rotate the Peculiar Old Key. Then, insert and turn key. This will trigger a mechanism. The circle will open. Put on the eyepiece. The eyepiece allows you to see the Null element. The puzzle has four circles. Rotate each of them to match the image solution below. Once the puzzle is complete, another mechanism will trigger and open the safe. You have complete The Room Chapter 1.