Existing level data are placed in Assets/BubbleGame/GameData
You can right-click in the Unity Project Panel.
Select Create/BubbleKit/LevelData to create a new LevelData .
It should be noted that the project uses the AssetBundle mechanism,
So LevelData needs to set AssetLabel,
But we have a system that automatically rewrites AssetLabel .
So just need to know that there is AssetLabel.