I've recently started playing parkour again and I kept getting annoyed because I had to run all the way back up the staircase to get to my current parkour level. So I suggest getting sort of checkpoints to the level you currently are at to make it way easier and more efficient to play. So if you would die, you get teleported back to the start of the level you are currently at.
Warps exist. Although they aren't very pleasant to use for some players. The warps are either numerical, or use the Roman numeric system (I, II, III, IV, V, VI, VII, VIII,..etc).
I know about warps, but if you die and teleport back to the start of your level would be wayyy more efficient.