(Reached Itch.io limit)
(While writing this it would be pretty funny if the room through the flamethrower room leads to the room with cells because it says "cells" on the entrance only for it to have a open vent but I'm not sure about that. The walls are floors/celling's are reinforced to the core with metal but the doors.
Final things to add is the map is very very useless. Not only for the reason that the demo is linear so you can in fact never get lost. And the second reason is you can't move the map or zoom in or zoom out making it completely useless since you are more likely to figure out the general area by just moving in a random direction. Also even though I figured out how to access the ammo inventory, I feel like that should be reworked because it's very easy to miss and the game never tells you. Maybe a regular slot inventory or maybe a slider but you can sort through tools,ammo,etc using buttons. That's about it for part 1. (Note: Just realized it's a prototype, not sure why call it a "demo" and make a entire trailer on it . Seriously this is fully polished and voice acted so like I'm surprised it's a protype. I thought this game was gonna release in a few months or something lol. Probably makes this entire review pretty pointless but I'll post it just in case it helps since i spent like 30 minutes writing this)