About Rust OnlyUP Challenge
It is a facility that can only be climbed up by character control.
You can freely place and modify it on your server using RUST EDIT(https://www.rustedit.io/).
I am enjoying using it in combination with racetrack (https://chaoscode.io/resources/racetrack.74/) on my server, and it is very popular.
Editing is possible, but redistribution is prohibited.