New Super Mario Bros. Wii is "pretty difficult," series creator Shigeru Miyamoto told us at a NYC press demo yesterday, acknowledging complaints that the previous 2D iteration of the franchise was too easy. After our disastrous performance in last week's hands-on, we'd agree with that assessment.While "Demo Play" makes concessions towards novice players, NSMBW celebrates hardcore gameplay. By earning the super coins hidden through each level, you'll be able to unlock a series of "Super Guide" videos that highlight "super skills" tactics. These videos will reveal how to get infinite 1-ups, find the secret goals and show alternate ways of playing the game. (One video we saw showed three Yoshis working in tandem to lick and spit a hapless Luigi throughout the level.)The newly released video above highlights some of the various stages in NSMBW. Does it look "difficult" to you? You can also check out North America's all-red packaging after the break.