"Bonus Stage - Sonic Labyrinth" is a high quality rip of "Bonus Stage" from Sonic Labyrinth.
Joke[]
This is an arrangement of the advertised track using instruments of "Float Islands" from Kirby's Dream Land.
At 0:04, the logo changes to a version in the style of the Kirby's Adventure logo to match the musical change.
The image used in this rip.