Will be a bit more feedback oriented here, as I mentioned on the game page I enjoyed the experience! For reference got ending 1/2.
The visuals are great, so is the music and SFX selection. The dialogue is pretty straight to the point, enjoyed reading the main character's comments and freaking out. I also enjoyed the story and concept of the game.
The camera movement is a bit weird, It stops as soon as mouse gets to the border in fullscreen/off the window in borderless which makes for some unneeded clunkiness. On the last sequence I couldn't turn as much as I wanted because of a 2nd monitor plugged in and ended up facing a wall and walking sideways to the door lol probably my biggest "issue".
I think the flashlight could be just a bit stronger, as the maze is already a bit confusing as is. I don't think it would diminish from the... very bright objects.
The microgames could be rebalanced a bit, they go from fairly hard to "afk-easy" at seemingly random, and the abrupt change provides a bit of a frustrating experience. The jumping sound was super goofy xD
Super minor, but the audio could be rebalanced a bit, the ocean effect is too loud at first. The main menu icons could be a bit bigger as well.
Lastly I enjoyed the "surprise shock" twist, but I do think for a game people will randomly open it should be a bit more explicit in the description.
Edit: Lastly, congrats on the first 3D publication!