Quick Note: Murasaki Baby is a great puzzle game that uses everything but the Vita Buttons and Joysticks, and does it well. That said, it's really short and ends abruptly. If you enjoy shorter, abstract games or unique puzzle games, pick this one up. Otherwise, you're better off else where.
The PS Vita is such a unique blend of hardcore gaming and phone interfaces. Most gamers despise the touch screen, but that mostly comes from developers not utilizing it properly. Though not perfect, the simple touch control scheme of Murasaki Baby helps bring you closer to Baby without getting frustrated, and the game is all the better for it.