I like the PS1 style graphics but i don't really get why you cranked up chromatic abberation all the way up. I really hate that effect which they use in almost every indie horror game made in recent years. I have a PS1, those games didn't look grainy like this! :) Anyway it's your artistic choice. The handdrawn art in the cutscenes look absolutely gorgeous, main title art looks terrific too. I would have add cutscenes instead of showing the images in the dialogue but it would take extra time to do that so it's fine for the jam.
Game is very successful at creating the sci-fi horror atmosphere and immersing the player into the game's setting. The artstyle and ambience sound, sfx are spot on. Record logs are a nice touch to give player bits of information for the story, it's really cool. Perfect of use the jam's themes. Multiple endings create replayibility that's another pro.
What's really missing in the game for me is the combat. There should be enemies and combat in a dungeon crawler game. This game plays more like a horror game with grid based movement. Even the most "walking simulator" type of horror games have enemies in it where you escape from them even if you don't fight against them.
Very cool game in terms of art and storytelling but i will give it 3 stars bcs it doesn't exactly play like a Dungeon Crawler and some post processing effects in the game really annoyed me. If it was a horror themed jam, i would have given 4 stars. My rating may change as i play and see the other games in the game jam. No matter how much i criticize the game, i think it's still a great achievment and can be developed further into a very good game. Good luck!