Hi, this looks great! Will try it out.

One bug I saw is you're using "pollen" for the Gleba pollution which was the name in pre-release versions of Space Age but it got changed to "spores" at some point. So I think the Gleba multiplier setting here isn't taking effect

  for type, val in pairs(prototypes.entity[enemy].absorptions_to_join_attack) do
    if type == "pollen" then val = val * settings.global["ee-pollen-multiplier"].value end

Edit: Also you might want to add "foundation" to the default list of safe tiles. (I forgot it for Bream, going to add today.)

Thanks for the heads up! I'll look into that this evening. The API docs have "pollen" as an example of AirbornePollutantID, so I assumed that was the ingame name as well.

I'm curious how much of the code you recognize now, since this started as a copy of your mod with just a few tweaks to spawn probability.