Hold P and Q to ensure you are not starting Rubik's cube. When you are ready, take your hands off the keyboard. You will have 5 seconds to inspect, and then the timer will start. Click when you are done. If you want you can put Rubik's cube on top of your mouse to press it. Not mobile-friendly. Sorry for the inconvenience.
Thank you to @Orangedup for suggesting the project. Hope it is what you wanted.
