Actually beat it.
there's a button panel on the right side of the table thing with the white bucket on it. You get the code for it by finding the bulb for the floor lamp. Mousing over stuff shows you what you can interact with, but you still can't interact with each one until you get the item/code to solve it.
The heart box looks like a color puzzle but you actually have to click each one a certain number of times.
It would be nice if the clickable areas were less of a clickspam pixel hunt and if the game told you that you need a clue/item for something that's apparently clickable when it won't let you interact with.