Excellent update that does a lot to flesh out the mechanics and universe of the original game while retaining the same feel and approachability. Mario is a lot more nimble (though it takes a while to get used to his moves), and the newly added puzzles are challenging enough to be rewarding, but not so much as to get you stuck on a level for hours on end trying to figure it out. As usual for Nintendo during this time, the game does a great job of easing the player into each new gameplay element before exploring it in depth and upping the challenge. The one thing that let me down a bit was the sound design, hearing that same annoying jingle speeding up when doing timed puzzles gets old quick and I eventually muted the sound.