Как делать бандлы думаю знаешь ? https://www.assetstore.unity3d.com/en/#!/content/45836
Код
using (WWW sceneLoaderConnection = new WWW("http://127.0.0.1:8080/unity/testscene"))
{
yield return sceneLoaderConnection;
if (sceneLoaderConnection.error != null)
{
Debug.Log("Scene Download Error");
}
AssetBundle sceneBundle = sceneLoaderConnection.assetBundle;
string scenePath = sceneBundle.GetAllScenePaths()[0];
Debug.Log("scenePath = " + scenePath);
SceneManager.LoadScene(scenePath);
}