Registering Colibricks (Mac version downloaded from this site, not from the App Store)
There are two ways of getting the full Mac version of Colibricks: Either download the full version directly from the Apple App Store (Colibricks should be available there as soon as the store opens), or register the demo version on the Kagi website to unlock all levels.
Order now at the Colibricks order page on the Kagi website. They offer a variety of payment options, including credit cards, cheques, cash, PayPal, etc...
When you have paid the registration fee, you will receive a code that can be used to unlock the full game. You can then open the Colibricks demo, enter the code in the Registration menu, and start playing the full version immediately.
Once again, registration is not required for the version downloaded from the Apple App Store.