Well done. Only things is, that I had some crashes: when I was spotted, the game would just silently close. I'm on windows. Other then that great.
I would personally not want the respawn button show the main menu because that's one click more, annoying if you die multiple times.
Also the door in the room with the switch does not show the E symbol. Was confused for a moment what to do. Keep up the work, with some love this could be really nice! Music +Art -> lovely :)