Frobisher says... it's worth it because it's FREE!
The games use the Vita's touch features pretty well, including the back touch panel and the front one in combination. The camera is also use, but be sure to be in a well lit area or it will not recognize the functionality even in low light. So the games are quite tricky if you're not in the right area, or in some instances, standing to be able to turn around for the camera gameplay.
It's a definite download if you have the PS Vita, if you don't try it you might be loosing a few minutes of entertainment but be aware of the offerings of the game. There are a couple of downloadable packs that will cost you $1.99, so pretty cheap but I didn't got too interested to the point to getting more mini games to play. But it's a definite quirky distraction with some interesting design elements.