The atmosphere (especially the soundscape) definitely sold the horror. The art and design of the enemies & the player's ranged weapon are very thematic.
Unfortunately, it appears to be riddled with game-breaking bugs. Collecting chests doesn't seem to decrement the number remaining correctly or consistently, the melee attack does not seem to worm, and the ranged attack consistently crashes the game. Plus, the game over screen stays on-screen even after the game has started a new attempt.
Gameplay video here: