Nice job getting this all together!
I am going to be a broken record here! Pacing is definitely the best feedback you will get for this one. For the first few minutes of gameplay, it felt like nothing was happening at all, and the time between different events was far too long. I felt myself getting bored almost immediately, and if I was playing outside of a jam, I probably would have just quit within a couple of minutes. Players have very limited attention spans, one of the first things we have to consider as designers is how do we get that juicy dopamine hit of anticipation built up ASAP. So I would definitely look for more ways to sell that early on, especially when you are going for such an atmospheric game like this.
Also, I could do with a few less mostly naked guys on their knees in chains with tentacles; that was giving me even more dark thoughts than the rest of the atmosphere. :D