I always try to learn something in a game jam and I've been looking at game optimisation with this one. If I had made this the way I normally do I think my PC would have melted, so I'm happy it feels professional.
Since people keep getting stuck at the same point. When you follow the music box/ lights, walk into the lights next to the garages with the X on it, then go to where you get the flashlight and do the same. The last location is next to the car under the elevator.