So I would like to say this game is pretty much average. Sure it is quite hard, but that is a topic I won't discuss here. The actually reason is in terms of quality; Compares to the original SMB, this game doesn't improve any of the first game's features: no go backward, same OST and graphic. It also has a much worse and obnoxious level designs, and some extremely unfair elements (poison mushroom, warp that sends you back to level 1, hidden blocks), these elements makes the game triggering and too stressful while it is supposed to be adventurous, entertaining and exciting. At last, I recommend playing this game if you are willing to suffer and to test your patience as a gamer, or else, just don't.