Hello DolphinDaiymo,
Unfortunately, I will be Rejecting your map.
The theme is original, there are a few castle themed maps, but none exactly like this. The build is good, it's got some nice detail and has been built well.
The parkour has some variety which is good, but some areas are quite repetitive. Try to mix up your jumps a bit more throughout the map, as well as experimenting with different ways of using blocks and items to create more original and enjoyable jumps.
The path was very confusing at times, I would recommend trying to have your parkour start a bit closer to the front of the map, as well as using something like a brightly coloured carpet to lead in the direction, rather than using cobblestone as it blends with the build, making it harder to see.
There were a couple of impossible jumps, make sure to test your map in 1.8.9 before submitting, as some jumps are only possible in higher versions due to hitboxes and jump heights.
The difficulty is good for a hard, with a few jumps being too difficult, and the length is good for an expert map.
Thanks for submitting your map! I hope to see more maps from you in the future.