I liked the music, one of the tracks reminded me of ravenholm from half life 2, the atmosphere was pretty spooky. I will be honest and say i do not like the idea of a pure maze game, its quite frustrating to have to essentially run around aimlessly looking for the third key, it essentially killed any tension/horror that could have been built up. I think this could be pretty good if you make the maze less complex or have better environment tells for where the player is