Small games for a waiting lobby in Minecraft (except JumpnRun)?

Small games for a waiting lobby in Minecraft (except JumpnRun)? Do you have any ideas?

I find a good way to pass the time are small riddles like hidden buttons or levers that open different doors or corridors! A good example is e.g. B. If you definitely have to rotate an item in an item frame

Thank you.

A little roller coaster around the waiting lobby would be cool

Thank you