Great atmosphere! I start playing without reading the description of the game and I found it really intuitive, which is very positive! The problem is that I escaped the dungeon without even knowing thee was an "enemie" or something to be scared of!
When the game returned to the start screen I was like "what happened?!". Then, reading the description I understood what the game was about. Maybe you have to find a way to let people understand that there is something that wants to kill them, otherways the game seems to be a little bit "flat" which it actually isn't!
Maybe you can add an initial cutscene where you see a shadow or something similar and then another one in which you can see that being the dark is something not good!
I completed the game just because I interacted with all the candles, if you add a "puzzle game" twist to this game, it can be really more complete than now!
Good one!