Click on the stage to progress backdrops.
Since a lot of people are getting confused and disliking the HP system, I made this documentation to make people understand the point. This documentation should explain the purpose of the HP while holding the purpose of the rings as well. Also, please do not comment on this project about how Sonic "doesn't need" HP, how Sonic games are really like, or you still don't like it. Because I know all about Sonic already and I know what you're going to say.
