So, definitely a very little long winded on the tutorial, but loved the voice acting. Couldn't get my head around some stuff, even after listening to it.

Once I got the hang of it, it works really well! Definitely has some sit-and-survive vibes. The mechanics are pretty creative and work well to give you anxiety. I wished there was more feedback when you're about to die. The oxygen does this (heavy breathing), but not the other things from what I observed.

One thing I wanna highlight is the sound design. It made it a lot more immersive! 

 A small bug: When I ran out of coal in one of the fail states, I got soft locked.
Some stuff was hard to understand, but amazing job overall!