Thanks you, I'm so glad people are taking interest in this game.
I gone through your feedback and I liked some ideas like adding ambient sound and few melee attack. I will add ambient sound for all night level to create a creepy vibe. These changes will be implemented in upcoming update.
I think bats are already annoying and most of them are placed where there are spikes or acid below them, so if I add stun player will take continuous damage from spike and acid.