Simple Room 3 is a Flash game from Yomino Kagura from the escape room subgenre and the third game from them to bear the name "Simple Room". While the entire game takes place in a single room that you are trapped in, the layout is anything but simple. Regardless, you'll need to figure out where the key to the exit door is by solving a series of puzzles and finding various clues.

Rxser here knows exactly where the key is and what combination to input and leaves the room in record time.