Much like zealorguy, I tried everything and I cannot get anything to do anything haha.
The only things that seem to be interactable for me was the cauldron, the ingredients, and the cash register. I was able to press E on the cauldron and it told me it was empty. The ingredients were pickup-able but would not actually interact with anything as they were, I assume, supposed to, and clicking on the cash register would freeze the physics it seemed (game was still pause-able so it wasn't a full crash).
The room was cute and everything was pretty impressive for 3 days though!