After the last Major update on the end of February 2015, we decided that we didn’t like the user interface [menus, task manager, achievements menu…] very much, so we started to redesign the whole UI from the scratch.
Finally, we have just finished with the new UI for the iOS version!!! [April 31, 2015]
All the code for the new UI is a custom code in Unity without the help of GUI layer or the new Unity UI system. After experimenting a few days with the Unity new UI system we found that it was too risky at that stage to use it. So we build some custom classes to manage a custom UI system with dynamic capabilities for multiple screen sizes.
Check out for the new update and have fun!