Runner2018/Assets/!Castle/Scripts/SpeedUp.cs

using UnityEngine;
using System.Collections;

public class SpeedUp : MonoBehaviour
{

    private static SpeedUp Instance;
	
	void Start ()
	{
	    Instance = this;
	}


    public static void StartRace()
    {
        Time.timeScale = 1;
        Instance.StartCoroutine(Instance.Up());
    }

    private IEnumerator Up()
    {
        while (transform)
        {
            yield return new WaitForSeconds(1f);
            Time.timeScale += 0.001f;
        }
    }
}