First release.

Stack the same block in a vertical line and you have an elevator. Stand on one and:

• Jump for one floor up
• Sneak for one floor down
• Sneak, then jump, to go straight to the top floor
• Sneak twice quickly to go straight to the bottom floor
• Right-click a pad with an empty hand for a floor picker

Put a sign against a pad and its first line becomes that floor's name. Floors without headroom are skipped instead of teleporting anyone into a wall, and the ride down comes without fall damage.

Pad materials, the maximum gap between floors, every one of the five controls, the cooldown, sounds, particles, a world black- or whitelist and all messages are configurable. Tested on Paper 1.21 through 26.3.