Better parkour is an addon designed to add some new special blocks to parkour, such as timer start/stop, checkpoint block, kill block, etc. Does not require experimental gameplay. This is designed so if you want to make a parkour map, you can just apply this behavior pack and not have to worry about creating a timer system, checkpoint system, kill system, teleport system, and more!
Better parkour is a addon that is easy to use. Type /function start to bring up a menu of everything except the timer (which is done through /function timer). All you need to do is put down a command block (repeating, always active) with /function parkour typed in it. Depending on how big your map is, you should add a ticking area (ex. /tickingarea add circle ~ ~ ~ 4 commandblock).
It also adds two new “Modes”: Hard Mode, and Easy Mode. In Hard Mode, you will receive the nausea effect, which will make it much harder to parkour. You can see if someone else is in Hard Mode from a red particle that spawns at their feet. In Easy Mode you will receive the jump boost effect, which makes it easier to parkour. Easy Mode spawns blue particles under your feet.