Hi, thanks! I'm one of the developers of this. We actually sorta made a tutorial but that got lost shortly before we submitted the game... you can still activate it via the button "Start Tutorial" in the in game menu that appears when you press Esc. And we should probably add somewhere that that's possible... And, yes, we should definitely add an explanation on how to use the anthill and tornados! Didn't even think of that honestly.
And lastly, thank you very much for playing our game!!!