It looked and acted just like Sonic Adventure 2, but had the play style of Damizean's Sonic Engine, in the sense that it was fluid and glitchless.
At first the dream was random two player stuff. Sonic racing shadow, and then knuckles racing Sonic. Each character had a close up on their face, a quote, and then it would start the level, just like SA2. The level itself looked like a mix of all the desert levels in Sonic games.


But then it got really interesting. When Knuckles raced Sonic, the level played out like the first Act of Angel Island Zone. Sonic took the main route full of mostly loops and ramps, while Knuckles was taking short cuts by smashing rocks, breaking down walls, gliding over gaps, or climbing around rooms on the walls.
It was just neat to see both characters taking completely different routes to the same goal. It was also nice when Knuckles found a secret room with diamonds and gems scattered across the floor. The room had no purpose, just a pretty little secret. Which left me wondering what its purpose might have been in a single player game.
