This game is basically a ROM hack of SMB1, but made by Nintendo. I definitely understand why Nintendo of America decided not to release game stateside though. There is poison mushrooms which to take the place of normal mushrooms a lot of the time, lots of precise platforming, some devious enemy and hidden block placement, and frickin' wind. Heck, they let you jump over the flag in one of the World 3 levels, which leads you to a warp pipe that brings back to the first level. Very mean. But with the ability to time travel on the Switch, this game is actually quite decent. Not as good as the first game, but I like it.