Sonic & Knuckles
There are also Starposts in the acts. If you hit a Starpost, it will spin for a bit, and if you lose a life, you restart at the last Starpost you touched. Starposts can be used to go to the Bonus Stage, if you touch them if you have 20 or more Rings. Then, a ring made of stars will spin above the Starpost, and if you jump into it, you go to the Bonus Stage.