Balloon Trip Breeze could be one hell of a high score game.
Balloon Trip Breeze, from an outsider's perspective, seems very simple. You use the GamePad's stylus to draw gusts of wind to guide your balloon-bearing Mii past different obstacles. That's basically it.
However, there is a devious high score game lying underneath Breeze's exterior. At the recent New York Wii U Preview Event, NWR Staff Writer Josh Max and I engaged in some minor score wars, vying to get the higher score. It was fun, competitive, and awesome. We both commented how this will continue over Miiverse when the system comes out. Damn it, it will. Also, I want to beat him.

The experience is basically just Balloon Trip, the fantastic extra mode in the NES game Balloon Fight, but with an awesome new art aesthetic and a new input method. You have a zoomed-in view of your character on the GamePad that, for the most part, you should ignore. Your character is always centered on that screen, so after some adjustments, you should be able to look at the TV and use the stylus on the GamePad to make the adjustments needed to move your character around.
You can use the GamePad's touch screen to also pop obstacles, such as spikes or rival balloon fighters. That requires some deftness as you glance down at the GamePad to pop the obstacles and then go back to the TV to get right back to moving.
You also need to worry about collecting all of the balloons on the screen. As you collect them consecutively, their value goes up. Miss a balloon and you have to start over. It's another wrinkle that makes this high-score affair more intriguing.

Only time will tell how much the experience lasts over time, but judging from how much time I spent with Balloon Trip on my 3DS Ambassador copy of Balloon Fight, I have a feeling I might be diving down the Balloon Trip Breeze rabbit hole.
Balloon Trip Breeze is just one of the 12 Nintendo Land attractions, and one of the six single-player-only games that appear to be very high-score-based.