Isn't Parkour the same as Parkour Minigame?
Quick explanation: We all know what Parkour is. Parkour Minigame is a game where there are (most of the time) 3x3 platforms quite close to each other which you can jump to. Meanwhile blocks spawn which you can break in one hit to get a power up. Speed, jump boost,invisibility or you can do something to your enemies (Yes there are multiple people) by spawning tnt (Redstone block) above everyone but yourself or give them a short wither effect. It can't kill you. You will get hit which sometimes make jumping annoying. You can hit your enemies but you cannot kill them. The only way your enemies and yourself die is by falling into the void. But you will respawn instantly.
The goal of the game is to get, if I remember correctly, 10 points. You can get point by breaking diamond blocks.
Its a really fun game.
If CubeCraft decides to bring it back they can perhaps add a mode where you have to get the most point in a certain amount of time.