New Super Mario Bros. Wii is the Wii port of the New Super Mario Bros. game, which was originally designed for Nintendo DS.
New Super Mario Bros. Wii allows up to 4 players to play as iconic Nintendo characters, Mario, Luigi, and two colorful Toad options, and venture through Super Mario World style levels with polished 3D graphics.
Gameplay is very accessible, but there is very little guidance. The game assumes you know what to do, period. You have basic controls, like arrows to move and duck. Then, you have the run button, which doubles as the grab button. Finally, you have the jump button and the bubble button and so on.
You get many power-up items to work with, as well. I personally love the helicopter power, which gives me a boost into the air and a downward drill attack. There are also the classic fire and ice powers, along with a penguin suit and a few other options. These power-ups only complicate the control scheme slightly, so you will not require much time to figure out how a power works.
The power-up options are the tip of the iceberg, though! The real fun is in the interaction with other players. You can grab other players, carry them, and through them. You can also throw objects at them or hold them in Yoshi's mouth. You can also use Yoshi to spit power-ups at other players, which can be pretty handy on rare occasions.
OK, so you run around on a Super Mario World style world map, similar to a board game like Candyland. You stand over a level dot and press the jump button to enter that level. Each level has a world-oriented title. For example, the world is 3, and you are on the second level, so it is called 3-2. This map system works well and is not an annoyance at all.
The music is obviously a hit, as well. Classic SMB tunes are played with very little variance from the classic titles, which is fine by me. I enjoyed the music, but obviously, it isn't a game I would leave sitting just to listen to the music. It is not that great.
Overall, I think this game is worth getting if you have friends to play with, but I do not think it is as fun to play by yourself, unless you are very skilled and are a Mario fanatic. If you decide to get this game, you can find it fairly cheap, probably in the $25 range.