I like Edge a lot. It's addictive and elegant in its simplicity, and the geometric world is bizarrely engaging.
Batman: Arkham Origins: Blackgate Deluxe Edition is both fun and frustrating—exactly the kind of game I don't like reviewing. If you can focus on the parts that work (exploration, collectibles) and downplay the stuff that doesn't (the map, the combat), you'll have a good time. I can't recommend this to people who already played it on Vita or 3DS, though—unless you really loved it, it's probably not worth the double-dip.
ASM2 is still a good game at its core, with some improvements over the original, but they really botched the Hero/Menace element.
Swords & Soldiers isn't especially long, containing three campaigns with 10 missions apiece, but you can go into Skirmish mode for practice sessions and unlock some interesting mini-games. There's even an interesting two-player mode in which one player uses the GamePad and another play uses the TV and a Wii Remote, which is fantastic.
[T]his is a wonderful game that I obviously can't stop playing, and I can't speak highly enough of. Endlessly charming and unusually engaging, Tomodachi Life is a fantastic diversion.
[W]hatever version you have access to, I can't recommend Shovel Knight any higher.
The Fall is a relatively short game, just a few hours long depending on how many puzzles stump you. The story is the most engaging thing, providing a unique take on the Three Laws of Robotics (although the laws themselves have been changed). There are really only three characters, but they're all well developed
If you liked the original Theathrhythm, this is more of the same with plenty of bonus content. It sucks me in every time I turn it on, to the point where my wife is actually pulling the headphones out of my ears to get my attention. It's a wonderful game. You should totally play it.
But the core gameplay—puzzle-solving with clones—is distinctly enjoyable. In a way, it reminded me of the Clank puzzles in Ratchet & Clank Future: A Crack in Time, but on a 2D plane. If that kind of puzzle-solving is up your ally, I'd give The Swapper a try.
UPDATE: I fixed the scaling issue. I just had to go into the Wii U Settings and shrink the bounding box a bit. Worked perfectly!