I feel like this could be a very good mystery game. I like the atmosphere you were going for, however i found it very difficult to progress since it seems that there's many invisible walls i cannot pass through.
The painting on the wall in the room on the left of the entrance is on the wrong layer and goes above the player when walking next to the wall.
After I died the first time i could not pass through any doors and was stuck in the hallway. The right side of the hallway had collision a solid 1m in game away from the wall.
I downloaded the zipped version. That could maybe be the issue, maybe the installer one works better?
One recommendation I can give for future jams is try to make a WebGL version. There needs to be a very low barrier to entry for players to try your game. I know WebGL sucks and you have to optimize and sacrifice for performance sake, however it's very worth it!
Good luck with the bug fixing. hope you can do it before voting ends!
Good submission!