Fun game for sure! very tense when you turn and those quiet robots are just behind you xD spooky.
It could actually fit the theme way better with few little tweaks:
You could add a transparent shader effect on windows that makes it seem like the robots are coming from other dimension. add voice lines like "get in the hole!", "Hail hole!!!" to play at random to give it a purpose and a story.(well then my game had no actual story either)
weapon system improvements:
If gun had reloading, it would be more fun(for a horror game) because that delay tense up the player for a moment. making shotgun limited and adding a pistol with unlimited ammo, with a chance of shotgun bullets being dropped by the robots would be great. If you are adding shotgun, make sure there can be multiple enemies so player can one shot more than 1 enemy.
simple visual improvements:
make the game darker, and give player a torch to take some info from player. very important for a horror game. you could make the robot head light glow with emissive material. or maybe you wanted to make sure it works smooth on most pcs instead of making it high graphics? do use more particle system. it just adds to stuff.
But I understand you didn't have much time and unlike me you actually made everything yourself within the jam time. I used my own old weapon system code and tweaked it into my game. So good work! making animation work with the game is also work that i avoided.
All the best!