Aaah, Plasmatic... I love this! You've improved so much since last time I reviewed a level of yours
Gameplay: For a 4* level the gameplay is amazing. Especially after the drop! The best part in terms of gameplay was the spider part actually. I kinda dislike the spider mode, but wow, that part was actually really fun, you actually managed to make a nice easy spider part!
Now, I think the gameplay is slightly inconsistant. The UFO part is the best example at this because it is too hard compared to the rest of the level. The spider part is also sliiightly too hard compared to the average difficulty (4-5*). One thing that bugged me was the blue jump pad spam autos in-between the parts at the drop. First of all, they're boring and repetitive. Second of all, they don't sync good enough with the song, so there really isn't any good reason to keep them. Furthermore I kinda disliked 0:47-0:49 in terms of gameplay, right at the gravity change in this UFO part. I disliked it because it's very sudden and the moving blocks move too slow which gives the player no time to react. That's surprisingly the only major flaw I have with the level in terms of gameplay
The rest of the gameplay is very fun to play, the sync is average, and I love the wave and spider part so much! Keep up the good work!
Design: Wow! I love this design so much. So beautiful! I recognize this design from your level "Land of Despair", but you've improved SO much since then! I can't find a SINGLE part now that looks messy, everything looks so well-executed and polished. The color combinations are beautiful and the backgrounds are actually very original and incredible
The first flaw is that there were little air decoration in the first part which made it a bit underdecorated. The second flaw I'm a bit unsure if really counts as a flaw, but the block design was really boring, especially in the first parts of the level. I mean, it's only one type of block: black blocks. But at the same time it fits so incredibly well to the theme of the level, so I'm not actually sure if you should change this or not... I really liked the block design at the wave part though!
Keep up the amazing work! There is however a LOT of copy+paste, please cut down on this.
Originality: It's not often I say this, but this level is actually really original! I really like the theme and the backgrounds are so creative! However, the song choice is horrible... It's not that I dislike Xenogenesis, but it's incredibly overused. I know you can find an original song next time, you already showed me that in your level "Land of Despair"
Also more original block designs and air decorations would be nice.
Music Sync: I want the gameplay more synced, especially the jump pad auto parts. But the color flashes are extremely synced to the music sync, so I can definitely notice effort here!
FEATURE-WORTHY LEVELS (+ LEVEL PICK)
The rest of the gameplay is very fun to play, the sync is average, and I love the wave and spider part so much! Keep up the good work! 
Also more original block designs and air decorations would be nice.