Really neat concept! Of all the hypnosis themed rhythm games I've seen, this is the first to actually use the genre of "trance" music, somehow.
The fact you only use one button to control this, as well as the spiral-y visuals, really lend themselves to the concept.
I do think there's a couple of things missing from making this feel as polished and direct as it could be. Moving my eyes around the outer edges of the screen doesn't lend itself well to the feeling of "zoning out to the music," and the vertical flashing bar both distracted from the spiral and didn't feel like it gave me adequate feedback. I was especially confused with the vertical bar when I started to see beats come in at the left.
The concept is there, though. With another pass at the visuals, I think this could be really incredible! I'd love to see the spiral shape or colors shift through the song too-a little pulsing would go a long way. And the music kicks ass!!