This was fun! I like the creepy atmosphere and music, and it's visually appealing. I'm also surprised there's a bunch of graphical options you can set too! Really well done!
The lack of actual sound effects didn't make killing enemies and picking up the bells very satisfying, though. Also, perhaps make it so that the gun is full automatic, or decrease the enemies' health a little? It's a little exhausting to constantly spam the left click!