Use the Spawn Manager button on the main menu to enable or disable what spawns in the game.
Enemies can be disabled on a per-level basis. An example of how this works:
Only the host needs the mod for multiplayer. The host determines which enemies, valuables, shop items, and levels are enabled.
If you are not the host, this mod is ignored.
Please report them on the GitHub issues page.
If you do not use a mod manager, you can install manually.
Install the recommended versions of the dependencies above.
Place the SpawnManager.dll in the BepInEx\Plugins folder.
No configuration required. Everything is done through the main menu.
