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: So for the theme, unfortunately as Dancyspoon mentioned your theme sadly is not original which lowers your acceptance rate, you can always change the theme up a bit if you feel determined. For the detail, you've got a pretty basic design and I highly recommend that you add more detail to your theme! Possibly different type of blocks :D
Parkour variety/difficulty: Your parkour for an easy map sadly is quite too easy, I suggest adding some more jumps and some interesting parkour variety, slime blocks, fence, cobblestone wall, flower pot jumps, head hitters, bed/chest jumps, etc.
Good luck!