Nice game. The atmosphere is top-tier. I’d suggest adding at least a sound effect when the character interacts with something — or even better, an animation (for example, with the valve) so the player clearly understands what’s happening.
Overall, it’s great for a first game jam.
I made a game with a similar atmosphere — you can check it out and leave some feedback if you’d like
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Thanks for the feedback! Yeah, the valve was one of the last things I had to work on, but I ran out of time, which really sucked. It was my first time animating, and that really tunnel-visioned me into saying: "I need to animate this valve, but that'll take too much time."
Thanks for playing! I'll check out your game.