lvl 6?
 

Spider-man on the elevator. How to kill him?

We must connect the power, so the heat weaken the monster. There are two connectors in the room. All beings in the game are weakened with the heat . And you could just die from the cold that emit some of these beings

Close the doors on the roof and heat yourself if you are cold. Shoot the damn thing, it will die sooner or later :)

First of all you need to hit his legs, when he loses them all it will be easy to finish him.