Gameplay was smooth. There was a small bug when entering another room where the lights were (graphically) on but the game thought they were off - but the light switch returned everything to normal, so not an issue. Neat execution!
It was when going upstairs, the lights were visually on but when trying to read the book, it said ‘it’s to dark to read’ or sth but then was fixed by flipping the switch again. Can’t remember the exact circumstances that led to this though!