The elevator box is in place, but ehm.. Floating in mid air though.
To make it move (for now) Enter the elevator, press "E" on the button box, press "W" to go up (or "S" down to go down), press the button in the other direction to stop again.
(press either "A", "D" or "E" to release yourself from the elevator button)
Elevator will auto stop @ the top and bottom floor. YOU have to stop it while going up/down.
Note!: If you release yourself from the button, you have to re-use it in order to change direction (or to stop it)
I've also re-added lights. Which, funny enough, makes the place darker.