Details from IGN

[SpongeAlex]

http://www.gonintendo.com/viewstory.php?id=158491

A few of the bulleted details NintendoEverything gleaned from an IGN article:

Collect marbles that are placed around a three-dimensional room to open the next door
- Rotate the camera to preset points with the d-pad and press a button to make the world 2D
- Bridges, walkways, jumps that weren’t possible in 3D will be created so that you can access more marbles
- Can’t go 2D in front of a brick wall
- Hidden trophies only appear from certain perspectives
- Massive obstacles (bowling balls and soda cans) pop up and you have to roll them out of the way to keep on working
- Can unlock a robe for the main character
- Story is different than the PSP game
- StreetPass support: hide gifts in levels that other players can find
- New hint system

[KnucklesTheEchinda]

Sounds cool.

[Beat]

Sounds perfect for the 3DS.

[Burning Strangers]

I hope the marbles are a play on the phrase
'lost his marbles' as in gone mad.

Since the story of the PSP game at least was about a guy that couldnt sleep and went to a scientist that sent him inside his own mind to find the cure.