This comes from a Cubed3 interview from Lewis Pugh, the developer behind Twisted Fusion...
Cubed3: Have there been any issues working with the Wii U hardware since the transition from mobile/iOS?
Lewis Pugh: The Wii U has been a breeze to work with as a development platform. Lots of tools support HTML5 so it's very quick to get something up and running. It's a real blast to see your game running on both the GamePad and TV at the same time, it really does feel special.
Source:
http://ift.tt/1fwqUbs