Moon.cs

using UnityEngine;
using System.Collections;

public class Moon : StateMachine<Moon.State>
{
    public enum State
    {
        Idle,
        Move,
        Max
    }

    public float moveForce = 1.0f;
    public Transform model;
    public float velocityLookMultiplier = 0.1f;
    public float lookForward = 0.5f;

    public GameObject leftEye;
    public GameObject rightEye;

    public float minBlinkTime = 0.5f;
    public float maxBlinkTime = 2.0f;
    public float blinkDuration = 0.125f;

    void Awake()
    {
        Blink();
    }

    void Blink()
    {
        leftEye.SetActiveRecursively(false);
        rightEye.SetActiveRecursively(false);

        Invoke("UnBlink", blinkDuration);
    }

    void UnBlink()
    {
        leftEye.SetActiveRecursively(true);
        rightEye.SetActiveRecursively(true);

        Invoke("Blink", Random.Range(minBlinkTime, maxBlinkTime));
    }

    void Update()
    {
        UpdateMovement();
    }

    void UpdateMovement()
    {
        Vector3 move = new Vector3(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"), 0.0f);
        rigidbody.AddForce(move * moveForce * Time.deltaTime);

        transform.forward = -rigidbody.velocity * velocityLookMultiplier * (1.0f - lookForward) + Vector3.forward * lookForward;
    }
}