This beautiful game is called Festival of Magic, and it's something that's been on my radar since I saw it at PAX Prime earlier this month.
Above, you can see the whole demo that I saw there. Looks cool, right? Developed by a company called Snow Castle Games, Festival of Magic doesn't have an official release date yet, but the creators plan to launch a beta in early 2014 for PC and Mac. It'll eventually come to Wii U, and other platforms too. (They haven't figured out exactly which ones yet.)
If you're interested in beta testing the game, you can sign up here.