Thank you for playing it!
My idea for a gun is this. The player can get a old revolver with about 6 shots. If you fire even one shot, of course enemies around you will gather. If you hit accurately the target, you can wipe out the enemies in the area.
It's still in the conceptual stage, so I'll consider various additional elements and decide whether to add guns or not.
The lamp posts idea is very interesting! It could be applied. And I want to make more fear by new enemy or something. About a multiplayer, you are right.
This game is based on folklore called "Sai no Kawara", since it fit what I wanted to do.
Then, thank you for your kind comment!