// Use this for initialization
 void Start()
 {
     enemySpawner.StartSpawn();
     powerupSpawner.StartSpawn();
     cloudSpawner.StartSpawn();
     aircraft.StartShooting();
 }
    public void StartGame()
    {
        AircraftObject.InitialGameStarting = false;
        AircraftObject.IsPlaying           = true;

        // initialize aircraft input
        AircraftObject.Init();

        // background changing
        BackgroundController.IsChanging = true;

        //TODO: Background set to default at the beginning

        // aircraft shooting
        AircraftObject.StartShooting();

        EnemySpawnerObject.StartSpawn();
        PowerUpSpawnerObject.StartSpawn();
        CloudSpawner.StartSpawn();

        // let the game begins!
        IsPlaying      = true;
        IsDecreaseWake = true;
    }