This is pretty tricky. ^__^
I was using the edges of the platform. My run would have Sonic trip the edges a couple of times. I would hear him, change direction, and continue. The camera is pretty predictable. So most of the time, I am holding forward + right.
But I haven't figured out a way to get past the part that's after the loop. I'd hit the edge that's parallel to the wall with the tunnel in it. Then I'm clueless where to go. I need to figure something out. Doing the daredevil leap to the ramp, or crawling to the tunnel somehow, are both possibilities.