Hello Matskuko,
Unfortunately, I will be Rejecting your map.
The theme is somewhat original, there are a couple of pipe themed maps, however none exactly like this. The build is nice, it's simple but has some good details, and is overall well built.
The parkour is very repetitive, as most of it is normal blocks. Try to experiment with a larger variety of blocks and items when building jumps, as this will make your map overall more enjoyable to complete.
Most of the parkour is floating. In the future, try to avoid having an excessive number of jumps floating around the build and the void, and try to implement the jumps more into the build, as floating jumps can make your map look a bit messy.
The length and difficulty are good for an easy map.
Thanks for submitting your map! I hope to see more maps from you in the future.