Ian Tek is a game where you destroy digital threats by tapping on them before they arrive at their destination.
This game was made with Unity 2018.3.0 and I used heavily Odin Inspector and Serializer for this game.
There is only one game scene and multiple scriptable objects which tells the scene how the enemies are spawned. For this I created a tool which defines this behavior using Odin Windows. There is a screenshot of the tool.
Basically, for each level there must be what I call SpawnPool which creates the necessary pools of the enemies that are used on the level, then I have several scriptable objects with two dimensional int arrays which defines how they are spawned.
In this same window I've other tools that makes level creation a lot easier and less prone to errors thanks to Odin validations.