Frozen Factory: Zone 3
Red Star Ring 1: At the very end of the first room, just before the exit, you'll find a Red Star Ring on top of a stack of green chips.
Red Star Ring 2: After the first pinball mini-game, run straight forward. The Red Star Ring will be directly above a large bumper behind a couple of shielded robots.
Red Star Ring 3: Just before the exit of the second major area, you'll see three enemy robots and two stacks of green chips. Climb onto the leftmost stack to be propelled to another pinball mini-game. The Red Star Ring is at the very top of the pinball machine.
Red Star Ring 4: Near the end of the level, you'll come to a large, open room covered with electrified wires. Chase the bell across the room to reveal the Red Star Ring.
Red Star Ring 5: Immediately following the area with the electrified floor where you found the previous Red Star Ring, you'll come to a tight hallway. The final Red Star Ring is high on the right-hand wall. Get a running start and chain wall-runs between the two walls to reach it.