Lighthouse/Astronomy Tower

This was my attempt at making a piece of fanart for the upcoming MMORPG, Monsters & Memories. I've never actually made a dungeon before so this was a challenge for me, but I think it turned out okay!

The idea behind it is that it's an astronomy tower that the Langsdorfian League (a faction of powerful merchants) commissioned to be built to chart the phases of the moons, and while it does do that, it's also just a ruse to serve it's main purpose. Hidden in it's walls, deep gnomes (one of the races planned to be playable) have been hired to use alchemy to turn salt gathered from Glass Flats into gold, to which they smuggle out; and in return the deep gnomes are given the Langsdorfian League's resources to conduct their own experiments of choice. The tower also serves as a lighthouse to keep ships away from the rocky cliffs, while also conveniently keeping them away from their smuggling business. Behind the painting in the middle floor of the tower is an illusionary wall where you enter a room filled with hired mercenaries to guard the would be gold. To the left is the alchemy room where the conversion takes place (without ventilation, mind you!), and to the right leads down to a two part room of the cave that would be a storage area and contain a taskmaster boss. From there, take the loading platform down to the dockyard where the gold is shipped out and sold for high price. Up from the docks are rickety planks leading up to a secret entrance through the broken part of the bridge that the supposed astronomy tower workers take down to the docks to load the ships without having to go through the tunnels with the deep gnomes because, well, the deep gnomes are just a little odd for their liking.