Sonic Wave is indeed a level that's on the Geometry Dash servers. It's a basic Nine Circles level made long after the trend had run its course, and was exclusively created to dethrone Bloodbath, then was buffed when it failed to reach that goal, and as a result leaves a level that is borderline unplayable. The predrop is incredibly boring to play, as it's almost a minute of boring gameplay, that gets very monotonous to play, then all of a sudden you're thrown into the most impossible wave gameplay. This juxtaposition threw my brain off as going from zoned out to locked in, in that short of a time frame got very annoying, especially when I would die to the very beginning of the wave. Passing the beginning of the wave, was basically a straight shot to 49, which is the biggest coin toss in any level I've ever played, and eventually became the most numbing thing to die to (which in this case isn't a good thing). Passing the first wave, and the really easy cube part, you get to the second wave, which is the most unsatisfying, unfun, and awkward wave part I've ever played in my life, and dying to the 70s multiple times was the most miserable thing I've ever experienced in this game. After the memory cube, you get to the last wave, which is actually kind of decent, but all of the atrocities pulled off by this level before it causes this to be the most nerve wracking part ever, I died there once and almost cried because I had to play through all of the rest of Sonic Wave again. Overall, the gameplay of Sonic Wave is incredibly unbalanced, with some of the worst chokepoints I've ever played. As for the decoration, again, it's basic Nine Circles, and that just doesn't look good past its time. That being said, the influence this level had on Extreme Demons in the future cannot be denied, but that really doesn't excuse the atrocities it committed on my brain.

As it stands, sonic wave is not a very enjoyable level. The decoration is lackluster. As far as it goes, first half is completely empty and lazy, and the second half is pretty mediocre. The gameplay is fine to do in runs, but playing from zero is soooo boring. Some sections of the wave are actually pretty fun, but the beginning ball and first wave are both pretty frustrating. Though it cannot be understated the influence of the level, it’s not exactly the greatest circles level ever made, or even a “pretty good” one.

One of the most impactful levels in the history of Geometry Dash, Sonic Wave by Sunix is a 1.9/2.0 Nine Circles level that was hack verified but later reverified legitimately by Sunix. However, despite the everlasting effect on Geometry Dash as a whole, it kind of falls flat in some aspects.

Being a Nine Circles level, it's not exactly that unique, however it has a somewhat unique gameplay structure that isn't cube -> ship -> ball -> wave -> last cube, but instead is an XL that uses most of the song. The decoration is what you would expect from a Nine Circles level, but it is still slightly empty regardless.

Besides the decoration, the gameplay is not exactly enjoyable, having some major chokepoints throughout the level. However, it still is somehow enjoyable? No idea how, but if you enjoy wave, you will probably enjoy Sonic Wave.

Overall, an okay level, and is far from being abhorrent! If you want a good wave based level, playing this isn't a bad option.

A rich history cannot save this level as it feels like a bland extremely hard remix of Nine Circles with really bad decoration

I did this as a new hardest, and even tho it was a jump from a top 580 i really really enjoyed it. I think it does wave gameplay really well especially for its time, and it has a certain "threatening" aura that gives it a lot of charm even as a nine cirles level.

genuinely really fun wave gameplay especially considering it was hack verified by cyclic. at the end of the day though, it's still an incredibly bland rehash of the original, although it doesn't fall in as many pitfalls as the remakes around it