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: For your parkour theme, unfortunately, I'm personally going to classify this as non-original, we've got plenty of floating island parkour maps unfortunately that looks quite like this so sadly your theme is not original, for your map submission detail it's very basic, you only really added some little islands and the main island, nothing necessarily special in my opinion.
Parkour difficulty/variety: For your parkour difficulty, it does somewhat match the difficulty of a MEDIUM parkour map submission which is good to see, unfortunately for your parkour variety it's extremely basic, I suggest adding more interesting blocks like chest/enchantment table jumps, anvil jumps, cactus jumps, flower pot jumps, etc.
Good luck! :D