You definitely nailed down the retro point and click adventure vibe, but you made the worst kind of point and click adventure game. The kind where the player has to click randomly around the screen to try and find what they can interact with.
I liked the graphics, the sounds, and the mystery, but I found myself getting frustrated with the controls, trying to find the small parts of the screen that let me turn around, or trying to find which items I could interact with.
I think you should have at least added some navigational control UI so I didn’t have to look for the invisible button that let me turn around. I also think you could have added a highlight or outline to interact-able items when you mouse over them and made their ‘hit boxes’ larger.
Frustrating mechanics aside, I did enjoy trying to solve the mystery before I gave up. The setting was mysterious enough to keep my attention and the ambient sound really helped immerse me in the experience.
I think most people are not going to be able to solve this, so you should add a playthrough video to your page when you have the time.
Good job making an interesting game in such a short amount of time