Sewer Dungeon 2 (Patreon)

50 x 50 @ 150 pps

EDIT 11/06/2021 : Realigned the rooms to better fit the grid.

Some ideas : 

Square Machinery Room : you need to activate the machine to lower the water level in the main circle room.

Glowing plants : rare pharmaceutical plants you can brew to make potions or an infestation appearing that you need to investigate.

Rectangular room with debris : the wastes jammed the water flow. Go there and repair it by removing the debris.