Hey bigkirbypuff420, here is my critique of your map! (please note that I am only a Mapper and my opinion has no effect on the final decision)
The build is okay. I like some of these structures and I do believe I could see these in the Middle Ages. The main problem is that its floating islands. A floating islands map is typically very unoriginal when it comes to a theme and medieval architecture is not the most original thing. The parkour is good, but you need more variation. A lot of your jumps are floating and are solid block jumps. Players typically want to play courses with more variation so they don't get bored during your course. Try mixing in some daylight sensors, fence gates, soul sand, ice, water jumps, piston heads, piston bases, cobble walls, beds, cakes, etc. The parkour you did make fits the difficulty so good job on that!
Overall, this map is okay but needs a little work for it to be accepted. Good luck!