Congrats on your submission! I noticed, the credits and the intro both took up way less space than my monitor so a lot of it was the grey-ish "background color" in Godot. I have an ultrawide monitor. 3440 x 1440, but the actual gameplay was not affected by this and looked normal. Only those 2 screens were top left aligned.
The first time I was playing through, I punched in random coordinates, because I wasn't sure what I had to do and was able to go outside and there was nothing to do, it was very hard to see much of anything. I could go to the side of the drill but there was not anything to interact with and trying to go to the dark seemed to have like an invisible wall. So I went inside the vehicle and tried to go to a cluster of green dots and I got a system error message on the terminal inside the game. Good I thought, I'm getting somewhere now. When I went outside, it was black and I couldn't see anything at all and had trouble getting back inside. When I got inside, there was nothing to do and I couldn't see outside to do anything, so I closed and restarted the game.
This time, I tried heading straight for the green clusters and I wasn't getting an error and I was not able to go outside. I kept punching coordinates on different sides of the map thinking maybe I had to dig for longer but it never let me out of the vehicle and I wasn't getting the error on the terminal, so I don't know if I caused a different kind of bug.
From what I got to see, I liked the design of the vehicle and the PS1 like dithering. It felt claustrophobic and getting out of the vehicle was unnerving.
It would have been nice to have a representation of yourself on the map to see where you were. After punching in numbers over and over, I couldn't remember which numbers I punched in so I punched in coordinates that I was probably really close to because it only made the digging sound for about 1 second and stopped.