Hi Ragi,

Sorry they are a bit creepy-- they are computer-generated for security reasons and as we know, the "uncanny valley" can be a bit weird. We are working on new ones with different tradeoffs of security vs creepiness.

Meanwhile, a site can contact us with their details (URL or public key), and ask for their FunCaptcha to be customized so it shows one particular game by default-- in this case you'd want them to show the "roll the ball" puzzle.

Also, if you click the little refresh button in the footer of FunCaptcha it reloads with a different game (unless the site owner has disabled that).

Hope this helps, and thanks for the feedback.