Hey there, before going ahead with your map submission review I'd like to inform you that I'm only giving you my personal opinion/feedback on your parkour map submission and my personal feedback will certainly not affect your parkour map submission in the slightest, I recommend that you take in my feedback to improve your submission if there are any flaws, you don't need to and you're free to ignore me but anyhow, before going ahead I'd like to mention that I'm a Moderator not a Map Judge so this is just my personal opinion and I am not accepting or denying your parkour map as this is only my personal opinion.
Parkour theme/detail - Sadly I was here before you submitted your map and unfortunately there's already plane themed maps on ManaCube which in conclusion shortens your acceptance rate from my experience, you've got some fair detail on your map.
Parkour difficulty/variety - For hard maps, I guess your parkour does suit the difficulty, you haven't really got much parkour variety so I highly suggest you add more interesting jumps to your parkour, for example: For example chest/bed jumps, enchantment table jumps, flower pot jumps, etc.
Good luck! :)