Apart from the controls, new gameplay mechanics are also making their way into the Mario universe. Two new suits will appear, granting Mario new abilities and unique new ways to lose them. The bee suit, as shown in an E3 trailer, gives Mario a short distance flying ability but can be lost if Mario touches water. The other suit is the boo suit, which will turn Mario into a boo allowing him to pass through certain barriers and objects but can be lost if he comes in contact with light. These two suits add more gameplay than we could possibly think of at the moment, granted the Mario 64 team is deving it.
A multiplayer portion has been thrown around, but Nintendo analysist and general manager has stated that any multiplayer in Super Mario Galaxy will most likely be cooperative.

And now for impressions, of the prerelease demo. Few got a chance to play this coveted gem, most were only available at E3. Thankfully, some friends of mine happen to live in Santa Monica (close to the E3 site). Luckily, I happened to watch their footage of what they played and their descriptions of the game. And from what I’ve read from E3 attendees (and saw and heard from said friends), I have to agree with them, the game is nearly perfect. Camera movement has always been a hindrance to Mario platformers, but Nintendo has gone the extra mile to make sure this is not the case. The camera is tighter than before, and for the most part fully automatic. If you want to make adjustments yourself then the D-pad on the Wiimote is your base of operations. Mario moves just like before, except with a more “weightless” feel, not sure how to explain that better. Imagine being in space, but having a form of gravity, just not complete gravity. So, in short, believe what they say about Super Mario Galaxy, because the demo, only the demo, is truer than words can describe.

In essence, the impressions are more of a “he said, she said” deal, but its as close as many could have gotten to the game without a major press tag.
So far, Nintendo has created the perfect Mario game and spiritual sequel to the most beloved 3D platformer of all time. Come November 12th myarcadeplanet.com will have a full review, and complete first hand impressions of what is destined to be the Wii’s most impressive title across the board.