Unity3d pause monobehaviour without timescale

GameManager.cs

using UnityEngine;
using System.Collections.Generic;

public class GameManager : MonoBehaviour {
	readonly List<LifeTimeComponent> registeredComponents = new List<LifeTimeComponent>();

	public void RegisterLifeComponent(LifeTimeComponent component){
		if (!registeredComponents.Contains(component))
			registeredComponents.Add(component);
	}

	public static void UnregisterComponent(LifeTimeComponent component){
		if (instance != null)
			instance.registeredComponents.Remove(component);
	}

	public void PauseGame(){
		Screen.lockCursor = false;
		LevelCommand.PauseAllCommands = true;
		registeredComponents.ForEach(x=> x.Pause());
	}

	public void UnpauseGame(){
		Screen.lockCursor = true;
		LevelCommand.PauseAllCommands = false;
		registeredComponents.ForEach(x=>x.Unpause());
	}

}

LifeTimeComponent.cs

using UnityEngine;
using System.Collections;

public class LifeTimeComponent : MonoBehaviour {
	bool isActive;

	public bool IsActive {
		get {
			return isActive;
		}
	}

	void Start(){
		Activate();
	}

	void OnEnable(){
		Activate();
	}

	void OnDisable(){
		Deactivate();
	}


	public void Activate(){
		isActive = true;
		GameManager.Instance.RegisterLifeComponent(this);
		SendMessage("OnActivate", SendMessageOptions.DontRequireReceiver);
	}

	public void Deactivate(){
		isActive = false;
		GameManager.UnregisterComponent(this);
		SendMessage("OnDeactivate", SendMessageOptions.DontRequireReceiver);
	}

	bool paused = false;
	public void Pause(){
		isActive = false;
		PauseRigidbody();
		PauseAnimation();
		SendMessage("OnPause", SendMessageOptions.DontRequireReceiver);
		paused = true;
	}

	public void Unpause(){
		if (!paused)
			return;
		isActive = true;
		UnpauseRigidbody();
		UnpauseAnimation();
		SendMessage("OnUnpause", SendMessageOptions.DontRequireReceiver);
		paused = false;
	}


	Vector2 savedVelocity;
	float savedAngularVelocity;
	void PauseRigidbody ()
	{
		if (rigidbody2D == null)
			return;
		savedVelocity 		 = rigidbody2D.velocity;
		savedAngularVelocity = rigidbody2D.angularVelocity;
		rigidbody2D.isKinematic = true;
	}

	void UnpauseRigidbody ()
	{
		if (rigidbody2D == null)
			return;

		rigidbody2D.isKinematic = false;


		rigidbody2D.AddForce(savedVelocity  * (rigidbody2D.mass == 0.0f ? 1.0f : rigidbody2D.mass), ForceMode2D.Impulse);
		rigidbody2D.AddTorque(savedAngularVelocity  * (rigidbody2D.mass == 0.0f ? 1.0f : rigidbody2D.mass), ForceMode2D.Impulse);
		rigidbody2D.WakeUp();
	}

	void PauseAnimation ()
	{
		SetAnimationSpeed(0.0f);
	}
	
	void UnpauseAnimation ()
	{
		SetAnimationSpeed(1.0f);
	}
	
	public void SetAnimationSpeed(float speed){
		if (animation != null){
			foreach(AnimationState animationState in animation){
				animationState.speed = speed;
			}		
		}
	}
}