Adding onto the other comment, there should be a mod for that! Its somewhere in the mod list, I'll find the name for it in a bit.
Edit: Nano Revolution should be what you want.
where can you download that?
go onto options in the main menu, click the first box enabling mods, then refresh the tab and reopen the game, the mod menu should be the first thing you see from memory. then scroll through the mods, download them and start the game
