First I love the audio it remind me my old days in fez :)
The visuals are great too and catch me immediately. I love how a very simple idea can be challenging with cool designs.
Maybe the black hole feature would need more visuals markers to understand where you're heading. And also I would love a rewind feature (the restart do the job, but it could be help by a rewind).
I see you guys have fun on the last levels. The games gets somewhere else, I means it become a mystic snake, it's very interesting. Great job