Complex sentence: Hitting star post checkpoints while possessing 50 or more rings allows the player to access a bonus stage, in which players bounce around a gumball machine that dispenses shields, rings, and extra lives.
Split into simpler sentences: Hitting star post checkpoints while possessing 50 or more rings allows the player to access a bonus stage. This bonus stage is a bumper stage with a gumball machine that dispenses shields, rings, and extra lives.