Neat game!
I did enjoy the atmosphere and sound design with the AI and unique mechanics of having the mask and going through the rocks, but the game does have major issues with clipping, the animation is a bit janky and it bugs the character, while moving.
Most games tend to have the traditional W,A,S,D keys, which is helpful, but the arrow keys for the movement was not my favorite choice. I would also suggest adding the language option or some kind of translation.
Overall, good game.