very nice.
http://ds.ign.com/articles/666/666139p1.html
8.0 Presentation
Extensive adventure with several gameplay options. The developers push a decent story, but it's time to start giving DS cutscenes better focus instead of the "subtitled talking heads" type.
9.0 Graphics
Fast and furious action that ties both screens as one. Excellent combination of 2D and 3D elements with some really clever visual effects at work.
9.0 Sound
Extremely catchy background music that's very remeniscent of the Jet Grind Radio style. In-game voice work gives the action some charm, too.
9.0 Gameplay
The fastest, most energetic, and coolest 2D Sonic game created. The "unfair" elements of past Sonic games have been remedied with new and welcome gameplay elements. And it's incredibly challenging.
9.0 Lasting Appeal
The two character structure keeps replay high, and the single cart multiplayer races are surprisingly fun.
9.0
Outstanding OVERALL
(out of 10 / not an average)
Sonic Rush is an extremely polished DS title. It does a great job offering a fantastic, energetic old-school challenge that keeps the classic gaming style alive. Though the market's moved on to 3D platformers which, admittedly, affords developers more opportunity for variety in their designs, this game does evolves the original Sonic style wonderfully by combining contemporary technology with fresh and new gameplay mechanics. And it's tough as nails.