A bit surprised to see this on here. I've followed the Newer devs for quite a while and they're pretty good at what they do. This is a mod for New Super Mario Bros. Wii, as the title implies. A lot of work definitely went into it, which can clearly be seen through the various new enemies, worlds, levels and the addition of a new power-up. Newer Wii is significantly more difficult than the original game, clearly meant to be a mod created for more hardcore fans of the series. I myself found it sometimes a bit difficult to complete, but I liked it. It was about what I wanted from a New Super Mario Bros. game, albeit with a few bugs and missing quality of life changes.

Its best moments can make for some actually intense, precise platforming, but overall it's just too inconsistent in its level design and its construction to be worthy of a serious recommendation.

At the end of the day, I think NSMBWii was a very flawed foundation to work off of, and while Newer tries its best to make something a bit more thoughtful out of its template, it just feels like Mario Maker-tier level design too often, unfortunately.

It's a technical marvel, but as a certain washed-up YouTuber says:
"So is the cotton gym, but I wouldn't take it with me on the car!"

EDIT 09:08/2021: holy hell if this game doesn't have too much content for its own good. i would have rather seen half the number of levels with double the polish