The aesthetics of this game are excellent. It reminds me a lot of games like Mouthwashing with that grungy, industrial style, and I love how it embraces that "weary, literally working yourself to death" vibe. I think more landmarks or a minimap would've been very helpful, though, as I found myself quickly getting lost when I strayed a little too far. I also accidentally fell into the sacrifice pit at the very start the first time I played, so I think if you ever came back to this, there being a way to block you from entering initially until you reach X point would be a nice touch. That's not a major issue, though, since I wasn't constantly falling in or anything.
Great job, and I loved the vibe!