Why not cut out the middleman? Make the captcha be controlling a paperclip manufacturing device.

This comment is referring to this deceptively simplistic game: http://www.decisionproblem.com/paperclips/index2.html

Trust me this is nothing but simple and will take you on a wild ride.

As good as that one is, and I do rather like the themes, it loses heavily in depth and complexity to Kittens Game. Universal Paperclips will take under a day to beat; Kittens Game will not fall so easily.

https://bloodrizer.ru/games/kittens/

Oh, I thought it was in reference to the Paperclip Optimizer referenced every now and then on lesswrong.com :S

(It is, and so is that game.)

Oh, of course. Duh. :/