Go to /warp mariojump and you will find the Jumping Challenge! It is still under construction, and if you have any ideas on how it can be improved, or any new levels, then please post here!
Currently, we have levels 1.1 to 4.1; level blocks go like this:
1 - 2 - 3 - 4 - 5
Dirt - Planks - Cobble - Glass - Ice
I hope you're good at playing Mario!
EDIT: I have decided to not continue the jumping challenge any further. Anyone who would like to change it, or continue building it, can do so. No griefing please.