Alright. To start off, good game, neat environment and visuals. Although, the entire concept of looping and P.T. style game is not my cup of tea. The functionality of the game heavily relies on gameplay, which your project delivers, but, there are some aspects, which made the game weaker. Like the beginning stage, the crawling and winning the "escape route", that's was a bit ghetto, but for the tone it changed fast towards the ending.
Another big problem with the game is sound design, very weak and the copyrighted part needs to be removed, because it might be problematic for some. It's a personal preference, but just keep that in mind.
Now, objectively, for the demo, the game is good. It needs improvements, maybe a little ambience and definitely tonal change - either go with a dark humor or creepy atmosphere, they don't always work together.