Thanks for the feedback! Batteries will appear without a light but everything else can only appear and be picked up if lit by the flashlight or by other means.
A smaller and procedurally generated map is something I intend to work on going forward. And also a hint/tutorial system, along with objectives.
A fun thing I want to add as well: if you spin around an NPC their heads can turn faster than their torso cause their head to turn 360°, so this should snap their neck and cause them to die. I hope this fuels your imagination for your question. :)