void Start()
{
screenMinPos = Camera.main.ScreenToWorldPoint(Vector3.zero);
screenMaxPos = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width, Screen.height, 0.0f));
gameStatus = GAME_STATUS_STARTED;
life = initialLife;
lifeText.text = life.ToString();
score = 0;
scoreText.text = score.ToString();
InvokeRepeating("SpawnNil2", introSec + spawnClockSec, spawnClockSec);
InvokeRepeating("AccerateSpawnClock", introSec + accerateSpawnClockClockSec, accerateSpawnClockClockSec);
sound = SoundBehaviour.FindInstance();
sound.PlayBGMWithRestart(gameBGM);
}
