Personally, i am working on a couple types of player-only elevator with complex doors and whatnot. easy to use, though. You just jump to ride the elevator up or you fall down. And you just jump through the specialized doors. I will have to make a prototype. I have two models, one uses falling powder and the other rising gas. They are both flammable, so a trap could be implemented but it is also whatever can be integrated better. Like i said, i will get together a prototype.
If you want a trap in to kill the player i would suggest the gas model because gas has a 4-1 ratio of fire dots per gas dot.
I wanted a version that ran on air currents but it is not only almost impossible, but unreliable...
EDIT:
Well here it is. It only barely demostrates the priciple and the powder elevator does not work. I also need to make it more effective, so that it doesn't just waste a bunch of dots. I will work on it and place a new model eventually. Here:
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