It's definitely a pretty amazing homebrew, and as a demo, it's fun to tinker with, as well. I wouldn't say it's anything beyond 3D we've already seen on the DS, but again, for a homebrew demo, it's pretty damned impressive. Whomever made it seems to be very talented and will likely see themselves in a decent job in the not-too-distant future (if they aren't already with a prolific developer). Hope we see this project expand.