There is no indicator for knocking on the door :(
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Ive updated the game to make the sound ques, like the knocking, louder. Added a tip for when to hide, objective list at the top left corner when you're done cleaning and are picking up your stuff to leave, and made it so the cursor highlights when over an object you can interact with. The sound ques were there, I just made them quiet so sorry about that, but hopefully they are a bit more noticeable now. also did some small balancing changes and made of the faces more obvious to tell what emotion it is.