Looks like you did just fine

The ring flies on a perfect curve and lands around the erect cock of the first guy, rolling around it and coming to rest gently against his balls, getting a moan out of him. Perfect throw.

This puts you in a confident mindset as you throw rings after rings, missing only occasionally but not denting your confidence as one by one, the cocks of the tied up victims all wear a ring.

As the last cock gets a ring on it, confetti falls down the ceiling and you hear the guys start to moan. The rings on their cock seem to vibrate and shrink, pleasuring them but forbidding them to cum as they are lowered through the floor the same way they came in.

You hear a clap from besides you from the masked attendant.

"Congratulation Miss, you cleared that trial expertly. I wish you the best of luck for your next one." He says as he gestures toward a red door that just appeared. You nod in thanks as you go towards the door to face the next challenge.