Here's some videos from MTV on Super Mario Galaxy. The first one features the level where your inside a "pill" shaped capsule:
http://multiplayerblog.mtv.com/2007/10/16/super-mario-galaxy-on-video-narrated-by-nintendo/
The other video is really interesting. It's hard to explain you just have to see it for yourself:
http://multiplayerblog.mtv.com/2007/10/16/super-mario-galaxy-on-video-pt-2-a-quick-crazy-world/
http://multiplayerblog.mtv.com/2007/10/16/super-mario-galaxy-on-video-narrated-by-nintendo/
The other video is really interesting. It's hard to explain you just have to see it for yourself:
http://multiplayerblog.mtv.com/2007/10/16/super-mario-galaxy-on-video-pt-2-a-quick-crazy-world/