I'm underwater and stuck. I need the blue medallion for level 2 but it's stuck on level one and I have no way to get it :( I found a wall on level one that gave me a prompt but can't do anything with that either. I'm completely stuck and can go no further :(:(:(
Hi! Sorry this took so long to get a reply - you got flagged as spam by itch.io, so I didn't see your message until now.
Here is a step-by-step guide to completing that section of the water dungeon.
1. After you first obtain the Blue Medallion and reach the second floor, step on this spot on the floor:
2. Then defeat the enemy in the way, and step on this floor tile:
3. Follow this path, jumping across the raised pillars, and interact with the orb.
4. Go down the newly-opened ladder, retrieve the Blue Medallion from the teleporter, then go BACK UP the ladder you just went through.
5. Walk to the big magical circle on the ground on the second floor. That's it! :)