The Spin Ball is a very large blue ball with glowing, light blue arrow-like lines on the surface. The majority of this ball is embedded in the ground with only the top half showing.
The Spin Ball serves as a way for the player to unlock paths using Sonic's specific character abilities. When using it, Sonic performs the Spin Dash on top of it, causing the ball to roll while Sonic remains in place. This will cause a reaction in the environment that will unlock new paths or hidden contents, like unlocking a gate, moving a Tube into place or raising a Hydro Gate.
To use the Spin Ramp, the player must press and hold down on the Wii U Gamepad to activate it. The player can also walk on top of it to make it roll, though it will move too slow to trigger any reaction.