PLEASE USE THE SPOILER FUNCTION FOR THINGS THAT ARE A PART OF THE PLAY TEST
Decided it’d be a good idea to have a thread for suggesting additions / details for existing or upcoming floors. Things that could add replayablity, interactivity and/or just cool additions you think are missing.
Misc Suggestions:
Fire Extinguishers should have a small chance when thrown at full force and colliding to trigger the extinguisher, causing it to spray foam and apply push force to itself. Its foam should also extinguish the flaming hair NPC
The state of the pizza you get from Pizza Time should reflect on how many rough collisions it had since being given. 1-6 Fine Pizza. 7-10 Toppings are messed up. 11-15 toppings and cheese are now on the lid. 16+ does this count as pizza anymore?
The pizza could also be for the party in Room 111 on Floor 639; showcased by a stickynote left on the door, or you could just keep it for yourself. That’s always an option, no one is paying you.
Crates very rarely, when broken (if you manage to find a way) could have a random interactable inside.
The printed image of Frank should stick to wall surfaces it is placed against. Could also be given to other items so we can pin things to the elevator or apartment’s walls!
Snowballs of the same size should merge together when colliding and become one bigger snowball. Do not add a size cap. 
The two birthday cakes, should splat when thrown against something. Leaving behind a coloured splat decal of their icing (brown or white).
Water Droplets from Clouds should extinguish flaming hair NPC and the Sun.
Sprinkler should extinguish flame hair NPC.
Floor Detail Suggestions:
Floor 639’s windows should be smashable with anything of relative weight and force; crates, fire extinguishers, etc. Doing so causes loud wind to howl through the building. Players jumping out will die.
Floor 639 should have a chance for NPCs in the elevator to walk out and enter one of the rooms, perhaps leaving it unlocked for players to enter if they did. The room could be a joke room, or a room with some interactables to bring back to the elevator.
Comedy Club should be enterable, allowing players to either jump on stage and ruin the comedy act. But also to take over the comedy act themselves. Audience will wait till the person on mic’s microphone stops being active, and will respond with laughing, heckling or awkward coughing silence.
The Sun should be extinguishable by throwing a Fire Extinguisher at it, what side affects this could cause, who knows!
Pushing the Elements guy far enough by throwing an item at them, should end the floor early due to the song being ruined.
Duck should be enterable, this does not mean Duck wants you to be there and has a chance to not like you entering its white space. It will attack you. Probably. But if it does like you, maybe it will grace you with a smaller Duck to bring back to the elevator.
Jurassic Period, the T-Rex should chomp at anyone by the door and instantly gib them. Also should have a chance for a dino-themed character to enter instead.
Detective should have a chance to turn around and enter the elevator. The detective will seek out a random humanoid NPC if they enter or already entered and arrest them for various random crimes. Both detective and the arrested NPC will leave together on the next applicable floor. If the floor is apartment, both detective and NPC will leave via the stairway.
Button Dimension buttons should be triggerable by throwing items off them. Could also see use in other floors.
Beach should be enterable, it’s one of those floors that feel like you should be able to walk around in it.
Foggy Street could do with some variation on where switches are placed.
Cursed Hallway should be enterable, doors are locked. Colliding with the anime lady will instantly gib you.
Tornado should actively pull on everyone and everything in the Elevator, but is stronger by the door. Atm it doesn’t pull on you if you are furthest away from the door.
Train should be enterable, perhaps a lone flashlight item on the rail tracks could be a reason to enter it. But of course colliding with the train instantly gibs you.
Haunted Doll should be enterable, but when the blood starts to appear it should push all players back into the elevator so they do not miss out on the sequence of events. Perhaps there can be a few interactables to steal and bring back to the elevator. Not that the poltergeist will be happy about that.
Moon should be enterable, however due to no oxygen your player will begin to choke after several seconds and must return to the elevator to breathe. You can nab the US flag and bring it back to the elevator.
Late for Work should be a floor where an NPC can get on, not just get off. Perhaps even a unique NPC that is permanently on their phone, discussing business.
Help me Please! The NPC you “save” if left alone should have a chance to ‘eat’ other humanoid NPCs, leaving a bloody splat on the floor and a skull in their place.
Ring Ring should be enterable, if a player somehow manages to reach the phone. It should be answerable. This results in a very loud person being on the other end of the phone, what did you expect 
Edge of the Universe, throwing a number of items into the void will have the narrator comment on it. Perhaps littering in space isn’t allowed. Or are they gifts for them?
Bunnies. Collecting all bunnies will result in a bunny being in the elevator. Bunnies should be attracted to edible items, like fruit, cake, pizza, etc, and rush over to them. They will ignore the player and not run away while doing so, even if the player is holding the food (perhaps this can be a way to get many bunnies into the elevator). Food left long enough with a bunny nearby, the item will be consumed. Bunnies should have a night variant.
Dino Egg should have a number of areas it could spawn in.
On Building Fire, you can jump to the ‘fire pulley’ to the right and activate it. Activating the sprinklers and extinguishing the fire. What a hero you are!
4D3D’s printer should print out random images each time, out of a small selection.