Camera.js

function init() {
	player.setCamera(this);
	var playerObject = scene.getObjectByName( "Player", true );
	if (playerObject)
		this.lookAt(playerObject.position);
}

function update(event) {
	if (moveUp) {
		this.rotation.x -= 0.01;	
	}
}

Scena.js

function init() {
	console.log('INIT');
	window.moveForward = false;
	window.moveBackward = false;
	window.moveLeft = false;
	window.moveRight = false;
	window.moveUp = false;
	
	var onKeyDown = function ( event ) {

		switch ( event.keyCode ) {

			case 38: // up
				moveUp = true;
				break;
			case 87: // w
				moveForward = true;
				break;

			case 37: // left
			case 65: // a
				moveLeft = true;
				break;

			case 40: // down
			case 83: // s
				moveBackward = true;
				break;

			case 39: // right
			case 68: // d
				moveRight = true;
				break;

		}

	};

	var onKeyUp = function ( event ) {

		switch ( event.keyCode ) {

			case 38: // up
				moveUp = false;
				break;
			case 87: // w
				moveForward = false;
				break;

			case 37: // left
			case 65: // a
				moveLeft = false;
				break;

			case 40: // down
			case 83: // s
				moveBackward = false;
				break;

			case 39: // right
			case 68: // d
				moveRight = false;
				break;

		}

	};

	document.addEventListener( 'keydown', onKeyDown, false );
	document.addEventListener( 'keyup', onKeyUp, false );

}

function update( event ) {}