First of all, GG for completing this level! this looks pretty hard, and if you really have over 90k attempts on it I think it should get rated due to how much effort you put into it.
Mikezi's part: I mostly like this, but the air deco (like the arrows) are a bit hard to see. Effects and the custom BG are really nice, but block design could use some colors/layers instead of a solid black background. Also, it's hard to tell where the black spiky things are, especially in the wave part, so maybe make the glow behind them either brighter or larger. Overall though this is a pretty good part!
ButtStallionPC (what a name)
and Kugel's part: Effects are pretty good, but the big name at the beginning looks kinda undetailed IMO. Also, the air deco is lacking; try to put in at least some of it
Block design is mostly okay but in the part with the wave effect (which btw is really cool) block design does not look good, there's almost nothing inside the big black spaces.
RadiantButt (what are these names lmfao)
's part: I actually really like this part. Some minor criticisms though is that the white thingies in the wave part look really weird and out-of-place. Changing colors to make them fit better could help.
Kugelblitz's part: The star bg is good but there's really nothing going on in the bg besides it. Maybe add more colorful things like galaxies and whatnot and make the existing ones brighter and more in the center instead of near the ground like they are now. Block design is really lacking in this part so you should try to fix that. Also, in the last ship, the weird circle glow things look ugly and out-of-place, so maybe change or get rid of them.
Firestorm's part: Block design is a bit simple, but I think it looks okay here. One thing I don't like however is those weird rock things that fell at around 32%. They look ugly, so either get rid of them or add something to make them look less static, like making them rotate or adding a shake trigger. Overall this part was pretty good, I like how you seemingly combined Lazerblitz's style with Devon's style in Hypersonic and Subsonic.
Alex1304's part: Block design is really good here, as does air deco. IMO though the white thingies in the air deco look weird, but if you like it then it's fine. I don't have much to criticize here; this part looks great, is well-synced, and I especially like the different colors.
QuantumFlux's first part: The background looks amazing. Block design is a a bit simple, but nothing really horrible. Your name in this part doesn't look very good though. It suddenly pops up, rotates once really quickly, stops immediately, and stays there for a while before zooming out again. Make that process look more gradual, maybe make it fade in/out, add easing to the move triggers. In fact, the biggest problem with this part is that the moving parts look really static. Make the movement of the platforms more smooth instead of it being the same speed throughout the entire thing.
TypicalWorldGD: Air deco is okay, i guess. Block design looks really simple though, and the solid blue parts look kinda empty. Maybe try to fill some parts in with other deco like sawblades (especially those ones that don't hurt you) or other blocks. The colors don't look too good though, IMO gray doesn't go well with blue at all. Also, the spikes and sawblades don't have much detail so try to work on that. One last thing is that in some parts like the cube parts the entire level looks really empty. You made the moving objects look good though so good job on that.
Quantumflux's second part: It looks pretty good, especially the block design IMO. The sawblades don't have too much detail and the glow for air deco looks really lumpy and weird. Besides those points, the part looks okay. Also, this part looks so different from your first part lol
Aerin's part: I really like this part. The black glow in the ground looks kinda weird but I don't have anything else to say; this is a really, really good part.
Summary: Overall, this level looks pretty good. Some parts aren't as good as others but they're all at least decent. This level should get at least a rate, maybe even a feature!
Also, how well did I do on judging this level? Constructive criticism is always appreciated