This title builds on the foundations of SMB3. Where it vastly expands is the addition of Yoshi, deeper collecting, ability to replay levels from any stage of the game, and more hidden exits. The best part of this title isn't those things though, its the ability to save. Previous SMB title you had to play start to finish in one powering on, a problem if you had siblings or power outages. Gameplay is standard 2D Mario though Yoshi can be a pain in the ass at times. Worth buying.