WASD to move, left-click to clean dirty spots with maid skill, right-click to activate objects (Note: On Mac you can also use Option for right click) with thief skill.
Make sure to clean the room, so as not to raise suspicion. Score is based on how much of the room is clean (once the broom is fully bright the room is fully clean). While cleaning, search the room for the hidden valuables, but don't get caught stealing on the nanny cam! When the eye is fully bright, you're visible. Try to find the hidden safe when you're not being watched to win.