Instead of having the allex% and 100% categories, why not add a goodend% and badend% instead? It'd be a lot easier to understand and make a lot more sense, since allex% and 100% are literally just completing the good ending and bad ending respectively. And on top of that, why not add in an exany% category for completing the 6 ex levels with the any% speedrun timer on?

a long, sturdy piece of timber or metal set upright in the ground and used to support something or as a marker.

Does anybody here know exactly how to execute the forward dive jump? I've done it a few times by accident, but I'm not 100% how to do it on command.