Integration of 'Are you a Human' to replace captchas

I personally have built many sites in the past and have found that captcha these days are becoming more and more ineffective. I've recently switched to a new system called Are you a human?

It replaces the captcha system, it's fun to do and isn't a chore and as far as I am aware, I've had no troubles from bots with it so far.

The link is here http://areyouahuman.com