Nice work, the narrative and writing for this area really great, it builds up tension as you learn more about the world and I started to actually get worried that I was going to die when I went into a room or investigated one of the creatures. I can see why you were asking about the ending, it does seem like it's building towards an ending but that never seems to arrive, unless I missed something. I think it might make sense to have a room where you either encounter a final creature or have some sense of completing the exploration, I felt like once I got the mask something else might happen, so I wasn't quite sure if I had found everything. Another small suggestion, the doors are mostly centered between three tiles in most of the rooms, but there are couple of doors that are in between 4 tiles so they are off-center, it's a small difference but it made me unsure about where to find some doors as I was exploring. I think you could make sure all of the openings are three tiles wide, or you could just add more doors so it's easier to hit the door when you read the end of the hallway. But overall this is well constructed and really encourages the player to explore and learn about the fictional world, there's some nice moments of humor and lots of intrigue about what's happening in the lab.