I love the aesthetic cohesion of this game! The music matches the sonic outputs and feeling of the game and the visuals all feel as if they're part of a consistent space (ie the fonts, the shapes, the slight darkened details in the background. The simple, perpetual puzzle is also surprisingly complex and interesting.
My biggest critique is that I would like more control or input when moving the ring, it feels as if the ring moves too slowly for me to be really in control of what's happening. Maybe this could be fixed by decreasing the amount of time it takes to reset allowing inputs?