// Get references to the player and NPC objects in the scene
var player = scene.getObjectByName("PlayerObjectName");
var npc = scene.getObjectByName("NPCObjectName");

// Set the following distance and movement speed for the NPC
var followDistance = 5;
var movementSpeed = 2;

// Register the update event to control the NPC's behavior
scene.OnAnimate = function() {
  // Calculate the distance between the player and NPC
  var distanceToPlayer = player.getPosition().getDistanceFrom(npc.getPosition());
  
  // Check if the NPC is too far from the player
  if (distanceToPlayer > followDistance) {
    // Move the NPC towards the player
    var direction = player.getPosition().substract(npc.getPosition()).normalize();
    var moveVector = direction.multiplyWithScal(movementSpeed);
    npc.addToPosition(moveVector);
  }
  
  // Add additional logic as needed for NPC interactions and helping the player
  // For example, triggering specific animations, attacking enemies, etc.
};

// Add additional logic to handle NPC interactions and helping the player
// For example, detecting specific triggers, attacking enemies, etc.

/* <behavior jsname="behavior_SpaceshipController" description="Spaceship Controller">
    <property name="RollSpeed" type="float" default="0.2" />
    <property name="BankingSpeed" type="float" default="0.2" />
    <property name="MovementSpeed" type="float" default="5" />
    <property name="MaxSpeed" type="float" default="10" />
    <property name="MinSpeed" type="float" default="0" />
    <property name="MouseSensitivity" type="float" default="0.1" />
    <property name="SpeedIncrement" type="float" default="1" />
    <property name="SpeedDecrement" type="float" default="1" />
</behavior> */

// Behavior: SpaceshipController
// Description: Controls the movement of a spaceship using mouse and keyboard

// Properties
behavior_SpaceshipController = function() {
    this.RollSpeed = 0.2;
    this.BankingSpeed = 0.2;
    this.MovementSpeed = 5;
    this.MaxSpeed = 10;
    this.MinSpeed = 0;
    this.MouseSensitivity = 0.1;
    this.SpeedIncrement = 1;
    this.SpeedDecrement = 1;
    this.CurrentSpeed = 0;
};

// Called when the behavior is added to a node
behavior_SpaceshipController.prototype. = function(node) {
    this.CurrentSpeed = 0;
};

// Called every frame
behavior_SpaceshipController.prototype.onAnimate = function(node, timeMs) {
    // Get current position and rotation
    var pos = ccbGetSceneNodeProperty(node, "Position");
    var rot = ccbGetSceneNodeProperty(node, "Rotation");

    // Get mouse input
    var mouseDelta = ccbGetMouseDelta();
    
    // Mouse pitch and yaw control
    rot.x += mouseDelta.y * this.MouseSensitivity;
    rot.y += mouseDelta.x * this.MouseSensitivity;

    // Keyboard controls
    var keyState = ccbGetKeyState();

    // Bank left control
    if (keyState[65]) { // A key
        rot.z += this.BankingSpeed;
    }

    // Bank right control
    if (keyState[68]) { // D key
        rot.z -= this.BankingSpeed;
    }

    // Speed control
    if (keyState[87]) { // W key
        this.CurrentSpeed += this.SpeedIncrement;
        if (this.CurrentSpeed > this.MaxSpeed) {
            this.CurrentSpeed = this.MaxSpeed;
        }
    }
    if (keyState[83]) { // S key
        this.CurrentSpeed -= this.SpeedDecrement;
        if (this.CurrentSpeed < this.MinSpeed) {
            this.CurrentSpeed = this.MinSpeed;
        }
    }

    // Update position based on current speed
    var forwardVector = new ccbVector3D(0, 0, -1);
    forwardVector.rotateY(rot.y);
    forwardVector.normalize();
    forwardVector.multiply(this.CurrentSpeed);
    pos.add(forwardVector);

    // Update position and rotation
    ccbSetSceneNodeProperty(node, "Position", pos);
    ccbSetSceneNodeProperty(node, "Rotation", rot);
};

// Create instance of SpaceshipController behavior
var spaceshipController = new behavior_SpaceshipController();

// Add behavior to the spaceship node
ccbAddBehavior(player, spaceshipController);

In the provided code snippet, you'll need to replace `player` with the actual reference to your spaceship node in CopperCube. 

For example, if your spaceship node has the name "mySpaceship", you should replace `player` with `"mySpaceship"` in the line `ccbAddBehavior(player, spaceshipController);`.

Additionally, you may need to adjust the property values in the behavior's header code (`behavior_SpaceshipController`) to suit your specific needs.