The game might seem a little on the short side if you just run through it without getting some of the harder coins or unlocking 2 of the worlds that you can just skip if you really wanted to, but you probably won’t.
There are two new kinds of mushrooms that you can get one makes you giant and destroy everything in your path which is really very satisfying, and the other turns you into a tiny Mario and lets you get to places that you wouldn’t be able to if you were big.
There are 8 worlds standard stuff your ice world, desert world, the usual, but they have added some new stuff like these coins that are hidden throughout ever level, there are three in each level. Play New Super Mario Bros Nintendo DS NDS with Online Emulator