Very good start for a game!
I enjoy the stone throwing mechanic and it's fun to navigate the maze as you alternate throwing and picking up the stone with "Q".
However one of the key issues with it currently is it lagged immensely at first upon opening it, I don't really have the best PC, it's a bit above average, but up until you fall through the hole in the ground I was experiencing major lag, and after that everything just seemed to still run a bit slow. Along with that the stairs at the very beginning have a hole in them on the right side that you can fall through and with no pause menu or reset button it softlocked me and I was forced to ALT+F4 to reset.
This game could definitely use subtitles and some sort of reminder system to keep the player on track and maintain a good game flow. If this game is played without audio it would be quite difficult to get through the beginning without narration. Also there were points where I would forget my objective and wander aimlessly until I either remembered or stumbled upon it. The subtitles and reminder system would help great with clarity and flow.
Also the small pillar type things that speak when you interact with them can be layered if the button is spammed which creates a chaotic noise, I recommend a cooldown for the pillars that is the length of their dialogue.
That being said I still had an enjoyable time and I like the overall feeling of the game, I think with some polishing this could be a wonderful and tense game.