Humanity is Completely Defeated - Level 3 Walkthrough
In room 1, lift the wooden crate on the right to the snap on the left side of the room, open the door and go through.
In room 2, first climb onto the high platform on the left before pushing the crate down. Then press the snap button and open the door to pass through.
In room 3, first press the red switch on the wall to take the elevator down, then lift the crate to the elevator then go up the elevator. Put the snap on and open the door to pass through. .
Room 4, the last decryption of this level, is also the most annoying. The first step to enter Room 3 is to take the elevator down, lift the box to the red cart, and put it away. The character jumps and shoots to the left, adjust the cart to a suitable distance.
After adjusting the distance, take the elevator, doorz the box and jump to the platform where the switch is, press the snap and open the door to clear the level.