How do I complete the UV puzzle in Burning Trials?

In this section of the game, your aim is to not get killed by the Crushed Demon, who really really wants to kill you. The only way to survive is to shoot the correct arms. 

 

Tip: Use your UV light at the same time as your gun to identify quickly where to shoot.

 

Puzzle 1:

- If the player does not shoot the mannequin's arm in time, the Crushed Demon will climb up onto the front of the cart and kill the player

Puzzle 2:

- If the player shoots the arms of the mannequin on the right, nothing will happen (because it is not holding the gate)

- If the player shoots the arms of the mannequin on the left, the gate will dissipate and the cart moves forward

- If the player does not solve the puzzle in time, the Crushed Demon will kill the player

Puzzle 3:

- If the player shoots the arms of the mannequin on the left, nothing will happen (because it is not holding the gate)

- If the player shoots the arms of the mannequin on the right, the gate will dissipate and the cart moves forward

- If the player does not solve the puzzle in time, the Crushed Demon will kill the player