Theatrhythm, an oddly named rhythm game, follows a similar setup to Dissidia. Chaos and Cosmos are at it again and now music is the form of battle. You use the bottom screen to tap, swipe and hold in commands while your units fights in the top screen, which is where you keep your eyes on most of the time anyway. The system is simple, but even on beginner it starts off as a good challenge. If you liked Elite Beat Agents, or more recently Gabriella's Ghostly Groove, then you'll love the gameplay of Theatrhythm. It also breaks down the stages into Battle (where you battle a stream of enemies to the sound of that specific Final Fantasy's battle music), Field (a side scrolling adventure where your aim is to get to the end of the area before the music stops) and Event (which plays special sequences - and was not available in the demo). The controls are very easy and the touch screen is very responsive. If you've got rhythm in you soul then you shouldn't miss this game. Go check out the demo at least, its free up to 30 plays.
Kingdom Hearts : Dream Drop Distance is also available at a "whopping" 15 plays, but it is the shortest demo I've played in my life. If you're already familiar with the Kingdom Heart series you'll skip the tutorial. Controls are pretty much the same and the battle system follows the Birth by Sleep (PSP) setup. You hit with one button, dodge/block with another, and jump with the third. The fourth button is your special skills which, during cooldown, swap to the next one on your list. They can be changed with the d-pad, and you move Sora around with the analogue stick. That aside, you run into the game and meet Neku from The World Ends with You. I love TWEWY and its music and it's awesome to see the contrast between Neku and Sora. I was really looking forward to interacting with him but he doesn't join your party. One boss fight later you're out of playtime.
So even if Kingdom Hearts : Dream Drop Distance left me a little unsatisfied it is very beautiful and left my anticipating for more. Theatrhythm is also a day 1 purchase for me, but I've always loved rhythm games. The library for 3DS is growing steadily and I'm liking what I'm seeing.