Thankfully, there are no more traps waiting for them on these floors. The right-hand doors are safe to open.

On Floor 12, they'll find a small room. The only thing of note inside is a lever with four blue dots on it. On Floor 11, they'll find a very similar room, but the lever here has four red dots.

The lever on Floor 12 lowers the water level by 4.

The lever on Floor 11 raises the water level by 4.