We won't be too harsh on IGN for billing this video of N+ gameplay as the "first N+ DS footage." We'll just casually point over in the direction of, ahem, last month. Nonetheless, N+ video is always welcome. This short clip of a bizarre new level is no exception.
This level's devious design centers around a large open area full of gold that is also guarded, panopticon-style, by a sentry, with a set of switches that forces the player to run back and forth across the area multiple times. You could choose to jump up and grab some of the copious gold, but it may slow you down, and that expanse has nowhere to hide from the targeted lasers.
If that's not enough N-Plussery, IGN also has an interview up with Metanet that discusses the DS version briefly.