Depending on your style, I’d recommend realism since there are few parts.
If that’s the case, metal grooves should be placed at the base of the elevator, and buttons should be pushed further in so they don’t stick out as much.
Overall, I love the concept of the project. Elevator games offer unique experiences of surprising the players on what is going on happen on the particular floor. Some general feedback for your game I would like to share with you is stated below:
Some floors don’t last long enough. Examples that I have came across is the stair ASMR and the falling elevator floor. Despite having to wait half a minute in the elevator, I believe there should be more than just the 5 seconds of being on these types of floors. Users should be able to get a good look of the environment so they can understand what happens during the floors event. Other than that, the concepts of these floors are great!
The overall design and build quality can be improved, quite a lot. Now, I know this is a project you just started, and that you should focus more on the core game mechanics and scripting, however you should keep this in mind before you fully release the game.
I am hoping this project gets finished and that this feedback helps you along the way!