You have to push all the boulders into the holes to get across the canals below. Down there you move other boulders onto the panels. You get teleported to the roof by one panel, where you shift another boulder and find a chest. Finally you move a boulder onto a panel to change another, and push a boulder onto the button. If you pushed a boulder falsely, leave that room and return, where the boulder has rolled back to enable you to restart that attempt 🌑... Very well done puzzle, Siren 😊!