Instructions
Move as the snake first approaches you. Once you get away from him, he should retreat momentarily.
Pick up the sword and wait in the center of the chamber for the snake to return. He may appear out of any of the pipes.
Stab the snake in the jaw with the sword when he opens his mouth. The snake will lie down and show its belly.
Hit the snake again with the sword, this time using your analog stick or arrow keys to direct the force of the sword's impact. The sword will fly out of your hands.
Retrieve the sword and hit the snake again. After four attempts, the snake will die and you can complete this stage of the game.