Just watch!
Even a single cat can fend off a thousand beetles. I decided to mess around with the clone blocks a bit and here's what I came up with. Every x seconds, if x is the amount of beetles alive, the beetles clone themselves. *UPDATE* I fixed a bug (no pun intended) where the clones are messed up, because it added to the score, waited [beetles] seconds, and then cloned itself. *UPDATE 2* I decided to add hunger like in the remix Jyke321 made, but presented in a different format.