"So I'll just create a civilization stage mod. I have no clue what I'm doing, I'll just maybe take out the city planner, maybe make the game crash when ending the stage, make all air vehicles cost 999999999, etc herpaderp"
Nobody is going to make a mod for you if you don't say anything about it or even say what you want.
Spore is creative, even the mods and hacks.
Or, should I say, especially the mods and hacks?
Now currently making content for the Life is Strange and Portal communities. Check me out on YouTube