All code: Written by cheapie

All textures: Hand-drawn by cheapie using GIMP

Sounds:
* celevator_controller_start.ogg and celevator_controller_stop.ogg
Contactor noises from inside a Speedprint SP710avi stencil printer,
which happens to use a nearly identical contactor to the brake panels in the Montgomery Miprom 21.
Recorded and edited by cheapie.

* celevator_cabinet_open.ogg and celevator_cabinet_close.ogg
From opening/closing a metal storage cabinet at work.
Recorded and edited by cheapie.

* celevator_pi_beep.ogg
Synthesized in Audacity by cheapie.

* celevator_car_start.ogg, celevator_car_run.ogg, and celevator_car_stop.ogg
Originally from "Elevator_Beeps & Opens.wav" by Brentanamo on Freesound, originally licensed under CC0.
https://freesound.org/people/Brentanamo/sounds/421599/
Edited by cheapie.

* celevator_chime_up.ogg and celevator_chime_down.ogg
Originally from "elevator bell dings closeup nice.flac" by kyles on Freesound, originally licensed under CC0.
https://freesound.org/people/kyles/sounds/453980/
Edited by cheapie.

* celevator_door_close.ogg, celevator_door_open.ogg, and celevator_door_reverse.ogg
Originally from "elevator doors open close.wav" by omsomaque on Freesound, originally licensed under CC0.
https://freesound.org/people/omsomaque/sounds/584911/
Edited by cheapie.

* celevator_drive_run.ogg
Originally from "transformer at night.wav" by ideaph on Freesound, originally licensed under CC0.
https://freesound.org/people/ideaph/sounds/641208/
Edited by cheapie.

* celevator_nudge.ogg
Originally from "Buzz Buzzer Buzzing Sound Effect" by deleted_user_7146007 on Freesound, originally licensed under CC0.
https://freesound.org/people/deleted_user_7146007/sounds/383352/
Edited by cheapie.