Pretty cool idea the 2 first minutes help build tension and made me wonder what was going to happen. I tried running to a monster to flash him for fun and he ran away from me haha I didn't expect that!
One thing to improve: Since I don't use a QWERTY layout it's was hard to play and the arrow keys didn't work.
Since you use Godot what you can do is use physical keys and boom! Done ^^
The sound design is pretty well done and I didn't expect several types of monsters so that's also a + .
It was fun!