It is confirmed by Teku Studios that the Wii U will be able to ADAPT to Directx 11 features since Directx is exclusive to Microsoft. Teku Studios replied in the comments section to clarify how they are using Directx 11 features in the Wii U.
“We really want to take Candle to Next-Gen consoles, so we immediately talked to Nintendo and showed them our precious game.”
“We love Nintendo platforms since our childhood has been full of them, so it was natural for us to go for it. We are already thinking about dedicated gameplay on Wii U – we are not doing any kind of quick port. We will designe specific gameplay features for its gamepad: all the menus, inventory and minigames will be tactile-controled on the touchscreen, as well as other unique actions concerning Teku’s candle. We will talk more deeply about this when we start developing all that stuff.”