* AmericansHateTingle: Even after the game was exported to the Americas and Europe, this game rarely appears in fan-made lists of favorite ''Mario'' games, as they do feel the game is either too hard to be enjoyable, or too similar to its predecessor (For what it's worth, Japanese reviewers also complained about the difficulty).
* AnticlimaxBoss: As if to throw the player a bone for the game's infuriating difficulty, the Bowser fights are unchanged from the first game. 8-4 adds two Bowsers to the mix (the first one is on a long floor with no ax rather than a bridge, is considered fake, and is a darker color, being the same shade as Koopa Troopas in castle levels), but you can skip the first one, and the game gives you at least two chances to get a secret mushroom/fire flower beforehand (if you can find them and keep them). Just watch out for the warp pipe pit with Invisible blocks prior to the fake Bowser (this pipe will send you back as far as you can go in the level) and the lava pit/piranha plant combo (plus a lone buzzy beetle) preceding the real Bowser.
** 3-2 and 6-2, the two main underwater levels, are tricky, but relatively easy compared to the rest of the game.
** After the insanely grueling 7-2, the game treats you to 7-3, one of the easier levels in the game, which has very few enemies and only consists of super springs and reasonably big platforms, with just enough time for you to figure out where to land. It's tricky, but not hair pulling in difficulty. The same cannot be said for its [[HardModeFiller later equivalent]], C-3, which adds a single [[DemonicSpider Lakitu]] just to make your life miserable.
** B-4. Compared to the extremely difficult B-3 (or, really, any other level in the game), this level is a cakewalk. The bulk of the level is a repeating section where you get past an easy to dodge fire bar and pipe. No maze or anything else that's particularly difficult. Probably the easiest castle in the game.
* ContestedSequel: Fans either like this game for being an enhanced version of the original with unique and more difficult levels, or dislike it because it's [[ItsHardSoItSucks too difficult]] and [[MissionPackSequel doesn't really change much]].
* CultClassic: Due to its insane difficulty and similarity to the original ''Super Mario Bros.'', it doesn't get as much universal love as the other games in the series. Those who do love it, however, love it for exactly the reasons listed prior.
* DemonicSpiders: The Hammer Brothers in the original game were hard enough, but this one adds a variant that continually marches up towards the player. This version is even more difficult to pass without taking damage.
* ItsHardSoItSucks: Part of why the game wasn't exported, and why it had poor reception amongst Western players after it was RemadeForTheExport. Even [[OldShame Miyamoto himself disliked the]] SequelDifficultySpike. The other reason is that...
* ItsTheSameNowItSucks: Wasn't just a fan reaction. The #1 reason Nintendo decided not to export the Famicom version to the US was that they didn't think such an obvious MissionPackSequel would sell well in the States (note that simply being NintendoHard didn't stop them from exporting any other games back then).
* MisBlamed: It's widely and mistakenly thought that Nintendo of America refused to release the game due to the belief that Western players couldn't "handle" its high difficulty; by that same token, many other NES games shouldn't have made the cut (after all, the trope is called ''[[TropeNamer Nintendo]]'' [[NintendoHard Hard]]). The real reason was to avoid the pitfalls that caused the videogame market to bottom out in 1983, one of which was creating sequels by [[MissionPackSequel simply tweaking an existing game and slapping a "2" on the end]]. The game's difficulty wasn't exactly appreciated by Japanese audiences, either, who generally prefer gaming for the sake of leisure rather than for an extreme challenge; the number of Japanese games made [[DifficultyByRegion harder for export]] positively dwarfs the inverse.
* MostAnnoyingSound: Tired of the classic death jingle from playing the original ''Super Mario Bros.'' yet? If not, [[NintendoHard you will be long before you hit World 8]].
* PainfulRhyme: The poem you get after beating 8-4, which also appears in ''Vs. Super Mario Bros.'':
-->Peace is paved/With kingdom saved/Hurrah to Mario[[note]]or Luigi, but that breaks the rhyme[[/note]]/Our only hero/This ends your trip/Of a long friendship[[note]]100000 pts. added/For each player left.[[/note]]
* PortingDisaster: The GBC port on ''Super Mario Bros. Deluxe'' isn't necessary unplayable, but it strips several features from the original, which is not brought up in-game or in the manual. Luigi as presented in the original is not available (you can switch between him and Mario on the world map, but he's merely a PaletteSwap in this version), worlds 9 through D are absent, the game uses Super Mario Bros. 1's physics (no [[GoombaSpringboard high bounce out of enemies]]) and graphics, the wind mechanic is removed, and [[CameraScrew the smaller screen introduces some serious]] FakeDifficulty.
** If you use a Warp Zone before hitting World 9, [[PermanentlyMissableContent World 9 is gone for good]]. Fair enough, the point is that World 9 is a reward for determined players. But if you play the ''All-Stars'' version, which has saving, reach World 9, then later use a Warp Zone, you will lose the World 9 privileges that you were previously rewarded with for your current save file. Forgetful players may then choose Save & Continue or Save & Quit rather than resetting or powering off the console and then find themselves having to unlock World 9 ''again from scratch.''
** Do you want the four extra worlds and the true ending in the original version? You have to beat the game ''[[FakeLongevity eight times]]!'' And since there's no saves, you have to do it without powering the system off; depower the system and you'll have to do it all over again. The ''All-Stars'' remake loosens the condition to "just beat the game once", and thanks to save files once you get to the special worlds you can quickly return to to them whenever you want.
* ThatOneLevel: Everyone probably has their own opinion of which levels are the most difficult. But, for a specific example, [[WebVideo/TheAngryVideoGameNerd Mike Matei]] did a live stream of the game in November 2015. It took him ''several hours'' to sucessfully get through level 8-3 (which has an abundance of Lakitus, Hammer Bros., and near-impossible platform jumps). [[ThisIsGonnaSuck And, he knew ahead of time that 8-4 was gonna be a bitch.]]