Really interesting concept! The idea of an immortal world isn't new to me, but the idea that the body can still get ruined (as the game says) and the person still lives? That really is hell. I finished this game wanting to see more about the state of the world and its people... I also really liked how the little girl and a part of Life was shown in colors while the rest of the game is in black and white. Incredible work to the entire team!
Some notes--the Marauder, if played first, would be confusing to players as the Barkeep is the only one who does the worldbuilding. Also, both stories don't seem very connected. How does the Barkeep remember the Marauders name in the Marauders storyline, but not his own?
There were also some visual glitches when advancing fast during a transition. Maybe you can disable player input until the next scene is properly loaded? (I was a little shocked to see you did this in Unity-- I'm so sorry)
I'm a little unsure of the tone you want for the story. Dark and gritty is what I gathered from the logline and screenshots. If that's the case, the usage of emoticons takes away from that. There were some comedic moments in there, which takes away from the impact of... well, everything. It's less "oh, hell. Everythings horrible" and more like "oh, okay. Everything sucks". Of course, not saying to get rid of it completely--there's ways to have comedic moments in a dark story without taking away from what's important!
This part can be disregarded, but it would've been cool if Life's character design was less human and appealing and more... strange? Eldritch? Inhuman? Life, although they're the one keeping humanity tethered to this hell, seems very disconnected and harbors some form of grudge. It would be nice to see more of this anger in more than just facial expressions! After all, this is a concept/god we're talking about