The best action-RPG on the DS, and better than the original, the ability to use the stylus makes this the superior game.
I'm not going to spend too much time comparing games, but I will say this, being able to use the stylus as opposed to a Dual Shock 2 or a Wii-mote, makes this game so much more accessible.
As you can imagine, the use of the 'celestial brush' is the center of this game. So naturally, being able to use the stylus on the bottom screen of the DS is great. Slashing through enemies, creating whirlwinds, Bombs, Firebursts, etc. make the action oriented combat of this game a blast. Okamiden is kinda like Ninja Gaiden DS, The World ends with you, and both of the Zelda DS titles, all wrapped into one game! If you liked any of those games, go buy Okamiden NOW! For a game on the DS, it's one of the top five, and most likely will make the top 25 on many GOTY lists for 2011
The only gripe I have with the game is actually my favorite part of the game, the stylus. Once in a while when you draw something, it does not register properly, so there's a few times where you'll get killed, so try to stay neat and "color in the lines!"
As for the graphics, they are outstanding as always. The Story is immersive and engaging, and will last you upwards of 40 hours. A definite buy, especially since it's MSRP is only 29.99 U.S.