Hello there!
I would have to give your map a -1. The theme is a bit overdone, as there are a lot of sandy/desert themed maps already, as well as cave maps for the underground portion. The build is also a bit bland, while it fits the theme, I fear there's nothing really making this build stand out.
As for the parkour, it has some variation in throughout the map, although I feel there could be more use of odd blocks, such as heads, walls, beds, chests, vines, water, trap doors, etc. Even so, the parkour is not well mixed. By this, I mean that these different varied jumps you are using are not will distributed throughout the map, and the parkour is easily identifiable by sections (series of fences, series of normal blocks). Try to mix together different kinds of jumps to make an interesting and unique course!
Finally, I think the difficulty is a bit inconsistent throughout. Some parts are very easy, while some are very difficult. Try to make the difficulty more even throughout.
The map is a good length for an expert, and there aren't a ton of floating jumps, although there are some. Try to attach jumps to the build when you can to avoid a messy look :)
Please note that I am not a Map Judge! I am just a Helper trying to give constructive criticism on maps to help improve people's skills in the community! Good luck on your submission :)