Amazing, just amazing. I loved the puzzles, the aesthetics, and the fact that you have a level editor is super impressive and the icing on the cake.
Just a few suggestions for improvements, and these are all just to improve what is already a great game:
There is the potential to use musical sfx to a greater extent. The general rotate sfx did not gel with the background music, and feel part of it, in the same way that the cymbal crashes for success did. If you pushed this idea, perhaps using a melodic note on a synth that fits the harmony and timbral sophistication of the bgm, with the note chosen randomly from a scale, or ascending, even following a composed sequence of notes etc, it would be really nice.
The menus look gorgeous, but it would feel better if they were a little more responsive. Choosing a level quickly, it felt like the game was waiting for the animation to finish before starting the level. I'm not sure if this is because you are waiting for the level to load first, before changing what can be seen?
Anyway, don't worry about the above too much, I am so impressed with your game and I will definitely revisit the level editor when I have more time.
Thanks for sharing. I reaaally like this one.