Oh, I completely forgot to add an exit button for the PC version because I expected most people to play in the browser… Sorry that it’s missing. But for now, you can safely close the game with Alt + F4 — it’s completely safe in the case of my game.
There is a volume control already — it’s located in the bottom-left corner. When you press the settings button, there’s a volume slider, a pause option, and a toggle to disable the CRT effect.
Thank you very much for the feedback!