Body trigger script for ragdoll

using UnityEngine;
using System.Collections;

public class BodyTrigger : MonoBehaviour {
    public static bool finish = false;

    //used to play sounds
    public AudioClip bonesCrackSound;
    public AudioClip hitSound;
    public AudioClip oohCrowdSound;

    private AudioSource bonesCrackSC;
    private AudioSource hitSC;
    private AudioSource oohCrowdSC;

    //used to show text when entered in finish
    public GUIText winText;
    public GUIText crashText;
    public Color winTextColor;
    public Color crashTextColor;

    //used to know if next level exists.
    private bool nextLevel = false;


    void Start()
    {
        finish = false;

        //change text colors
        winText.material.color = winTextColor;
        crashText.material.color = crashTextColor;

        //ignoring collision between biker's bodytrigger and motorcycle body
        Physics.IgnoreCollision (this.GetComponent<Collider>(), transform.parent.GetComponent<Collider>());

        //add new audio sources and add audio clips to them, used to play sounds
        bonesCrackSC = gameObject.AddComponent<AudioSource>();
        hitSC = gameObject.AddComponent<AudioSource>();
        oohCrowdSC = gameObject.AddComponent<AudioSource>();

        bonesCrackSC.playOnAwake = false;
        hitSC.playOnAwake = false;
        oohCrowdSC.playOnAwake = false;

        bonesCrackSC.rolloffMode = AudioRolloffMode.Linear;
        hitSC.rolloffMode = AudioRolloffMode.Linear;
        oohCrowdSC.rolloffMode = AudioRolloffMode.Linear;

        bonesCrackSC.clip = bonesCrackSound;
        hitSC.clip = hitSound;
        oohCrowdSC.clip = oohCrowdSound;
        //--------------------------------------------------
    }

    void OnTriggerEnter(Collider obj)
    {
        if(obj.gameObject.tag == "Finish" && !Motorcycle_Controller.crash)//if entered in finish trigger
        {
            finish = true;

            Motorcycle_Controller.isControllable = false; //disable motorcycle controlling

            var m = transform.root.GetComponent<Motorcycle_Controller>();
            m.rearWheel.GetComponent<Rigidbody>().freezeRotation = true; //disable rear wheel rotation

            winText.enabled = true; //show win text

            if(Application.loadedLevel < Application.levelCount - 1) //if won level isn't last level (levels are set in File -> Build Settings)
            {
                nextLevel = true;

                if(m.forMobile)
                    winText.text = "CONGRATULATIONS, YOU WON! \n YOUR SCORE IS: " + Motorcycle_Controller.score + "\n\n TAP ON SCREEN FOR NEXT LEVEL";
                else
                    winText.text = "CONGRATULATIONS, YOU WON! \n YOUR SCORE IS: " + Motorcycle_Controller.score + "\n\n PRESS SPACE FOR NEXT LEVEL";
            }
            else //won level is last one
            {
                if(m.forMobile)
                    winText.text = "CONGRATULATIONS, YOU WON! \n YOUR SCORE IS: " + Motorcycle_Controller.score + "\n\n TAP ON SCREEN TO PLAY FIRST LEVEL";
                else
                    winText.text = "CONGRATULATIONS, YOU WON! \n YOUR SCORE IS: " + Motorcycle_Controller.score + "\n\n PRESS SPACE TO PLAY FIRST LEVEL";

                nextLevel = false;
            }
        }
        else //if entered in any other trigger than "Finish", that means player crashed
        {
            if(!Motorcycle_Controller.crash)
            {
                Motorcycle_Controller.crash = true;

                //play sounds
                bonesCrackSC.Play ();
                hitSC.Play ();
                oohCrowdSC.Play ();

                if(!finish) //if we haven't entered in finish make crash text visible
                {
                    crashText.enabled = true;

                    var m = transform.root.GetComponent<Motorcycle_Controller>();
                    if(m.forMobile)
                        crashText.text = "TAP ON SCREEN TO RESTART";
                    else
                        crashText.text = "PRESS 'R' TO RESTART";

                }
            }
        }
    }

    void Update()
    {
        if((Input.GetKeyDown(KeyCode.Space) || (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Began)) && finish) //if motorcycle entered in finish and space is pressed
        {
            if(nextLevel)
                Application.LoadLevel(Application.loadedLevel + 1); //load next level
            else
                Application.LoadLevel(0); //load first level
        }
    }
}