4-1) Displaying Score on Screen

1. GameManager

• Score추가
• UpdateScore() 추가

    private int score = 0;

    public void GameStart()
    {
        gameStarted = true;
        platformSpawner.SetActive(true);

        StartCoroutine(UpdateScore());
    }

    IEnumerator UpdateScore()
    {
        while(true)
        {
            yield return new WaitForSeconds(1f);
            score++;
            print(score);
        }
    }