I am going to get Bit.Trip Saga for the 3DS because it looks interesting. One of the games I saw a video of is Bit.Trip Void. From my understanding, it plays sort of like Fast Food. Here is a demo of the game, since I don't have Bit.Trip Saga yet, I don't really know how the game works, but I plan on getting it and expanding it from my knowledge I gain from playing the actual game. Anyway, up and down are the only directions used. How it works is avoid the white dots and touch the black dots. Each black dot is 100 points. Again, I don't really know much about the game so input is appreciated.