pause timer or player using Time.timeScale

hi guys i have a game manager script that i manage to pause the game when my player collide with an object by using Time.timescale but is there a alternative ways that i can pause only the timesystem and the game continue running if not then pause the game but the timesystem contiune running?

gamemanager.js

function Update(){

//if(isPaused == false){

if(!Paused){

Paused=false; } else {

Time.timeScale = 0;

Paused=true;

}

if(Input.GetButtonUp("Jump")){

Time.timeScale = 1;

Paused=false;

     //starttime = Time.time;
 
     //time += Time.deltaTime;
 
     OnGUI();
     }
 }
 

function OnGUI () {

Debug.Log("OnGUI");

 var guiTime = Time.time - startTime;

     

restSeconds = countDownSeconds - (guiTime);

 //display messages or whatever here -->do stuff based on your timer
 if (restSeconds == 60) {
 
     print ("One Minute Left");
     
 }
 if (restSeconds == 0) {
 
     print ("Time is Over");
 
     restSeconds = 0;
 
     Application.LoadLevel("2");
     //do stuff here
 Paused = true;