- Awesome Music: From remixes of old Mario songs to new songs, the game's soundtrack is very good.
- Demonic Spiders: The Angry Sun and Angry Moon. In Super Mario Bros. 3, the Angry Sun would simply dive for you, but this hack takes it to a whole new level by having them regularly spitting fireballs and iceballs respectively at you.
- Genius Programming: The game was built upon New Super Mario Bros. Wii, and yet it manages to work in a lot of new features not even seen in New Super Mario Bros. U.
- Hilarious in Hindsight: This game introduces a night counterpart to the Angry Sun, the Mad Moon, which was a concept that had not appeared in an official Mario game at the time. Come 2019, Super Mario Maker 2 introduces its own Moon, which also acts as a night counterpart to the Angry Sun, but is non-harmful and destroys all on-screen enemies when touched.
- Idiot Programming: This game has support for the Wii Classic Controller, meaning that it is possible to use the Classic Controller to play the game. What it does not have is a way to customize the controls...and by default, you jump with the A button and run with the B button, unlike in Super Mario Worldnote , despite the Classic Controller having a 4-button layout identical to the SNES's. You are much better off just using the Wii remote, even with the motion controls.
- Momentof Awesome: The game in general. The sheer amount, quality, and depth of custom content is mind-blowing.
- That One Level: 2-7, Windworn Dunes, for the same reason 2-4 in the original game was so annoying...the bleeping WIND.
- C-3, Parabeetle Peril, for pretty much the same reason as 7-6 in the original game...jumping from beetle to beetle in an autoscrolling level over a bottomless pit. Except this time, you also have to deal with Foos whose fog can obscure your view, and Flame Chomps which follow you around and spit fireballs at you. Without the Propeller Mushroom or propeller block, this level is a nightmare.
- 8-2, Jet Airship, is a nightmare. It's basically a longer version of the infamous airship stage in World 8 of Super Mario Bros. 3, which was already That One Level. Fast autoscrolling, bottomless pits everywhere, and tons of things shooting at you...this one is not fun.
- Actually, World 8 in general might qualify...even for being the last world, it represents a noticeable Difficulty Spike in the game; all of the levels are difficult, and many require very careful and accurate platforming and often memorization of the obstacles up ahead. Worse still, the world contains more auto-scrolling levels than any other.
- 9-9, Grey Mountains. It has the Angry Sun and the Angry Moon attacking you at the same time.
YMMV / Newer Super Mario Bros. Wii