Ninja Usagimaru: The Gem of Blessings

Played through as much of this as I could on the Vita (which includes a second game, essentially just more levels to play). A puzzle-solving game that gets really tough the further along you go. You have to set everything up the exact perfect way, in just the right order. It's a bit frustrating to be honest, not my favorite sort of puzzle game. But it's an all right diversion that works well on handhelds. The music will get old really fast if you get stuck on a level (which I did, plenty of times).