Interesting play of "escape-the-room" style! Did you intentionally slow down the player movement and decrease the camera FOV to give the feeling of claustrophobia? If yes, good direction, 10-20% more cam FOV though... I'd advise the spotlight's intensity to shrink slower towards the end (meaning: if battery100% = intensity 100%, battery 30% = intensity 50%, battery 10% = intensity 25%) because it gets really dark when you're down below 30% and can't find your way so easily around.