The lights didn't feel that great in this game. Would have been nicer if there was more ambient light. You can set a mood without everything being pitch black. The flashlight didn't feel all that useful considering the 5 minute duration on the batteries. If it had infinite duration and just needed to recharge after 5 minutes, sure, but with the limitation, I felt like it would have been nice to have it more useful. The lantern reduces your view radius and removes your default light unlike the flashlight so it also wasn't that useful, especially since the enemies seem to still come after you.
Had an issue where the combat lights just didn't activate and I just instant gamed over. This just felt really unfair and eventually it was so annoying that I stopped playing. Especially with the longer cutscenes of each gameover instead of just a return to last save or w/e.
I've noticed that a lot of RPG Maker games seem to try to do horror by adding more enemies. I honestly feel like it is better to have fewer, but more important enemies. More enemies ends up being more annoying than scary because you end up desensitized to the enemies. Having one hit kills only makes it even more annoying.