Props to you for creating a short and concise horror game in 2 weeks, especially at your age!
A couple things I took note of: The tension and atmosphere in the beginning was amazing, however, it did fall short during the middle and end. Also, the monster towards the end was dope on the ceiling with the chains dangling (seeing it from a distance), but up close, it was sorta meh with the animations and reveal. There are ways to work around this.
In-your-face, jumpscare horror is good, but I think for me, there's a lot to work with slow, psychological horror such as: Muted/ ambience SFX, monsters appearing from the corner of one's eye and suddenly vanishing, and a combination of various sound effects and a good OTS/ scoring (For ex. hearing whispering sounds in your ear as if someone is behind you, but when a player turns, nothing is there and no jumpscare).
Some game examples I've found fond of that do this are: Welcome to Kowloon, The Summer of '58 (a good combo of world building + jumpscares, albeit a little slow), and the Fears to Fathom series. A decent line-up for some game study/ theory.
After a few notes, I wanna end this on a good-note: You're amazing and I definitely see the talent with your game-development. A HUGE congrats for a game completed in 2-weeks, and I'm glad to cover it. Keep working hard to develop your craft (no pun intended lol).
- Kuya Sunset