Hey, thanks for giving it another chance, glad you enjoyed it! Yeah, the tutorialization could definitely be improved, the main mechanic is explained with a single sentence that quickly fades away :) Getting stuck in a room without a light is definitely frustrating, I didn't think about that case! I thought the ghosts would always kill you if you run out of batteries, but if the door is blocked, then they can't get to you.
I had a bunch more cool level ideas, but didn't have enough time to make those :-/ I spent like 5 days just implementing the lighting system, haha.