Sonic Mania unlockables give you more incentive ... If you were originally using the 'head to the title screen (back out of the main menu to reach it) press Y + B buttons together' method on ...

One Knuckles ... Sonic Mania. For completing Bonus Stages, you can also earn bonus moves from previous Sonic games. Finish Blue Circle bonus stages to get an Insta-Shield, or the Super Figure 8 ...

That’s a pretty big bonus, and I haven’t even started talking about the return of Debug Mode, the Insta-Shield, the Super Peel-Out ... you around (like in Sonic 2), & Knuckles mode pairs ...