void Start()
{
powerUpsByGuid = new Dictionary <Guid, GameObject>();
powerUpIconsByGuid = new Dictionary <Guid, Sprite>();
IDictionary <Type, PowerUpData> powerUpDataByType = dataLoader.LoadPowerUpData();
foreach (KeyValuePair <Type, PowerUpData> kvp in powerUpDataByType)
{
// Instatiate PowerUp and initialize it with args loaded from Json
GameObject powerUpPrefab = new GameObject();
IPowerUp powerUp = powerUpPrefab.AddComponent(kvp.Key) as IPowerUp;
powerUp.Initialize(kvp.Value.initArgs);
powerUpsByGuid[powerUp.Id] = powerUpPrefab;
powerUpIconsByGuid[powerUp.Id] = ResourceLoader.GetSpriteForPowerUp(powerUp.GetType());
}
}