Rahman origins. Great game, just the right level of challenge, and some excellent level design as well. If you've yet to try it out, it's kicking around mighty cheap nowadays.

Kirby's Epic Yarn - such a cute game. If you think it's easy, beat it 100%. There's challenge to be found if you want it.

They already did in January. Bought it in the WiiU-eShop for €9.99 then.

It has to be Wario Land: The Shake Dimension. Awesome game.

Being the noob that I am I voted for Rayman since that game isn't as hard as Donkey Kong ^^

DKC:R - what a question.

Its pacing is even better than Tropical Freeze. And the last levels are so exciting - shouldn't think about that otherwise I must put in the disc again (year that backwards compability...).

 Rayman Origins, because it's a slightly less polished Rayman Legends! That's not necessarily a bad thing, since Legends is the best 2D platformer since Mario World!

Loved DKCR and I've played Rayman Origins on PS3 and was really fun as well.

people actually voted Sonic Colours..... riiiiiight.

Without a doubt its Donkey Kong.