Thanks for playing the game! In case you wanted to know this is how the spiders work: They start in the mess hall in their roaming state (in this state they just pick random points within the limits of the room to go to), after a randomized time between 20 seconds to about 40 at most the spider changes to leave the room, they do this through the vents on the ceiling, then they decide on a random room to go to, the spider then drops down from that vent (it is actually super dangerous to stand right below a vent since the spider might just jump right on top of you), then when there they start roaming again. If they see the player (direct line of sight) they try to charge him, within the confines of their current room, still giving the player a chance to escape. Personally it was based off of Mr. X from Resident Evil 2 and the way he is constantly searching around to get you in the police station, but with the sci-fi setting it might definetly be closer to Alien: Isolation now you say it!
I'll keep a pause menu in mind for future jam games! I sadly only have one monitor, I did not realize Unity didn't bind the mouse to the screen. I'll see how this is done and try to implement it with what little time I have left! Thank you for you feedback and I am super glad you think the game is rad :D